List of permanently missable content
Golden Sun and Golden Sun: The Lost Age, for the most part, allow players to go back and collect any items, Djinn, and Summon sequences that may have been overlooked during their first pass through the content. However, there are a scant few such features that will become impossible to get if you fail to fulfill the limited-time conditions meeting them. Some of these pertain to the data transfer system between the two titles.
Golden Sun: Dark Dawn, in stark contrast, is notorious for structuring its plot in a railroaded manner that permanently locks off a lot of prior collectibles once you pass several "points of no return," which tend not to be thoroughly indicated in advance. Seemingly innocuous oversights such as overlooking a small side area can result in the party permanently missing a collectable Djinni for the rest of the game, and a fair amount of vendors will have become no longer available once you have reached the non-linear final third of the game set across the Eastern Sea.
In Golden Sun
After collecting Hermes' Water at Mercury Lighthouse, if you have not pulled the left tree back onto shore at Bilibin Barricade using Move before feeding the water to Tret at Kolima Forest, you will not be given one of the game's five Hard Nuts the next time you pass through the Barricade.
The Tolbi-bound Ship sequence contains a hidden method of landing the ship on Crossbone Isle before Tolbi, one that is executed by having your hand-picked rowers be stronger on the left side than the right by a very specific amount. This allows you to explore up to part of the fourth puzzle-room floor of Crossbone Isle and loot all the treasures from the first three floors earlier than most players playing the game normally. While none of the treasures on offer will be permanently missed if the player only ever uses the "official" Tempest Lizard method of accessing Crossbone Isle from Suhalla Desert late in the game, a lot of extra dialogue and some extra scenes will only be seen by detouring to Crossbone Isle during the voyage.
For the most part, any of the side objectives you may want to clear in advance of creating a clear data save file for the data transfer system can be completed at any time before fighting the final boss encounters atop Venus Lighthouse. However, if you win Isaac's solo match against Satrage in the Colosso Finals but then lose against Navampa, the third and final opponent, the game will proceed regardless, and you will miss out on two particularly noteworthy rewards spanning both games. First, you will not receive the Lure Cap, which has a particularly unique utility effect in that it increases monster encounter rate; this should be in the party's inventory so that it can be transferred into The Lost Age to help with late-game grinding efforts. Second, presuming this game file is used for transferring data, a bonus event that would reward you with the Golden Shirt will fail to trigger in The Lost Age.
In Golden Sun: The Lost Age
In general, any missing item unique to the first game and any incomplete event from the first game will be reflected in the password used to enhance the current game file, causing certain rewards to be missed if you have not at least Updated the password in time for when those events or rewards would be dispensed. If Isaac did not talk to the mayor of Vault after crossing Lamakan Desert, for example, Felix in this game will not encounter a bonus event where he must fight the Bandit and Thieves after meeting Karst in Madra, and he will not gain the Golden Boots as a result.
If Isaac did not go back to Alpine Crossing and cast Lift on the boulder trapping Hsu, Felix will not be given the Golden Ring when he first arrives at Champa. If Isaac did not rescue Hammet from Lunpa Fortress, the party will not receive an extra Orihalcon before setting off to sea following the Reunion. As mentioned previously, if Isaac did not win the Colosso Finals by defeating Navampa, a bonus battle against the Colosso Gladiators will not trigger in Shaman Village Cave after the Reunion, and so the Golden Shirt will not be rewarded. Finally, if Isaac did not acquire the Orb of Force in Fuchin Falls Cave, it will be impossible to find the Mars Djinni Shine in Contigo and reach the Masamune in Yallam.
As for unique items from the first game, Isaac's party would ideally join with the Lure Cap won from defeating Navampa and the Cleric's Ring from Crossbone Isle, which uniquely allows for Cursed equipment like everything crafted from Dark Matters to be equipped without fear that the wearer will be randomly incapacitated at the end of each turn.
When you bring Piers back to East Indra Shore and explore the beached Lemurian Ship with him, stepping into the final power room will automatically propel the ship into the ocean, causing East Indra Shore to no longer be enterable. If you have not collected the Cookie from the crate on the cliffs just left of the ship when this happens, it will be permanently lost.
The Lost Age, unlike Golden Sun, only offers a finite amount of Lucky Medals that can be tossed into the Lucky Medal Fountain in Lemuria. Once you have exhausted every Lucky Medal in the game file, any unique piece of gear that has not been collected from the fountain will become permanently missed, and it will no longer be possible to acquire duplicates, either. (If you somehow fail to land a single medal into the center circle by this point, you can even permanently miss the Eclipse summon tablet.) This issue can be ameliorated by having Isaac's party join with lots of Lucky Medals stored up in their inventory though the data transfer system, since Lucky Medals can be randomly dropped by Orc Lords in the first game.
The boss battle at the peak of Jupiter Lighthouse can be lost without sending you back to the most recently visited settlement's sanctum and forcing you to get back to the scene to try again; instead, an alternative cutscene will take place, and the rest of the game's plot and progression happens as normal. However, a Dark Matter will be dropped as an extra reward for winning this battle.
The game's extra-hard bonus dungeon, Anemos Inner Sanctum, can only be entered if you have collected all 72 Djinn throughout both GBA games. To ensure this happens, Isaac's party must join with both the Orb of Force and at least six out of seven of each of the four elements of Djinn (since one "make-up Djinni" of each element can then appear in The Lost Age after the Reunion depending on what is missing). If even a single Djinni is no longer possible to collect, the dungeon will be locked off, and all of its offered features will be kept out of the player's reach:
- Charon summon tablet
- Dullahan, the hardest optional boss, guarding the Iris summon tablet
- Sky Dragon as a renewable source of Orihalcons
- Bombander as a renewable source of Golem Cores
- Mad Demon as renewable source of Lachesis' Rules
In Golden Sun: Dark Dawn
There are three primary "points of no return" that lock off a fair amount of what you will have played through in order to get to those points: heading through the south exit of Konpa Cave, riding the reversed Alchemy Forge's cloud platform to the Clouds of Passaj, and stepping up to the small, purple pedestal in front of the Alchemy Dynamo in the deepest room of Belinsk Ruins, in front of the blue circle where the face appears.
Heading south through Konpa Cave
Following the boss battle with the three Stealthy Scouts in Konpa Cave, when you pass through the south exit from a puzzle room in which several pillars can be rolled to create a path across a gap, a cutscene will depict Blados having his men detonate explosives to cave in the path behind you. You will now be trapped within the Ei-Jei region of Angara, and all of the following features that were exclusive to areas north of the caved-in boulder will no longer be obtainable:
- Storebought gear between Patcher's Place and Carver's Camp, which include:
- Interact with shopkeepers in the following settlements to add Artifacts to menus:
- Patcher's Place for a Water of Life
- Carver's Camp for the Magic Rod
- Collectibles in Patcher's Place, which include:
- Mars Djinni Forge
- Power Bread in a chest next to Patcher
- Water of Life from defeating Dim Dragon Plus at Psynergy Training Grounds
- Collectibles in Goma Highlands Road, which include:
- Mint in a chest in the first screen, reached by riding a gondola
- Themis' Axe in a chest in the second screen
- Jupiter Djinni Gust in the second screen, reached from Carver's Camp
- Collectibles in Carver's Camp, which include:
- Mercury Djinni Chill down a ladder
- Lucky Pepper in a jar in the southwest home (reached by entering the chimney)
- Collectibles in Carver's Lumberyard, which include:
- Venus Djinni Flower underneath a wind blossom at Konpa Gate
- Collectibles in Konpa Ruins/Konpa Cave, which include:
- Psy Crystal in an exterior chest
- Jupiter Djinni Jolt on the roof of the ruins
- Elven Shirt in a chest in the Jupiter room
- Elven Rapier in a chest in the cave
Taking off for the Clouds of Passaj
After casting Cold Snap to reverse the Alchemy Forge in Passaj, approaching the cloud platform will prompt Karis to say, "If we leave, we may not be able to return again. So, ready to go, Matthew?" If you say Yes, you will automatically end up in the Clouds of Passaj. This will render all of the following features of the Ei-Jei region permanently unavailable, even though you can largely revisit all of the same locations once you gain the sailing ship:
- Storebought gear between Harapa, Passaj, and Kaocho, which include:
- Interact with shopkeepers in the following settlements to add Artifacts to menus:
- Harapa for the Witch's Wand
- Kaocho for the Blessed Ankh, a Psy Crystal, and a Water of Life
- Passaj after the Alchemy Forge is revived for a Psynergy Rod
- Venus Djinni Brick in Harapa (only possible to reach while the gate is open)
- Collectibles in Kaocho, which include:
- Lucky Pepper in an open jar in the dumpling shop
- Grandmother's Gift from elderly residents in the northeast part of town (eventually needed for Ninja Sandals)
- A Zol Ring given as a gift by the armory vendors in Passaj for fitting the blocks into the floor, after the Alchemy Forge is revived
Incidentally, the Clouds of Passaj themselves contain a Nut and an Herb that can be permanently missed once you climb the full winding stairs to the entrance to Craggy Peak Ruins.
Healing the Dream Tree
The only opportunity you have to add the Dream Leaf entry to the Encyclopedia is to talk to a townsperson in Saha Town near the closed gate to Kolima Village. Once you use Hermes' Water on the Dream Tree in Kolima Village following the boss battle with Sludge, both settlements' NPCs update their spoken text, and none of the replacement text boxes include any highlighted mentions of the term "Dream Leaf."
Approaching the Alchemy Dynamo
Requesting Arangoa Prelude does not count as a point-of-no-return because you can still leave Belinsk even while the music is playing, and the only functional difference is that the statue in the center of Belinsk will have temporarily revealed its stairwell leading to Belinsk Ruins. While subsequent cutscenes with Sveta and Ryu Kou portray the party as being locked into Belinsk ruins by walls that rise up behind them, you can still cast Retreat at any point to leave the dungeon and Belinsk, and Sveta will depart your party whenever you step back outside and wait for you back underneath the statue. The aforementioned walls will rise again as soon as you cross them.
The one true point of no return that takes place in Belinsk Ruins automatically occurs once you move right up to the purple pedestal in front of the blue circle (for the Ward system) of the Alchemy Dynamo in the final chamber of Belinsk Ruins. This initiates the cutscenes that will lead to the boss fight with Blados and Chalis, and the sequence that follows forces you to evacuate upward through the base of the risen Luna Tower back into Belinsk. Approaching the purple pedestal locks you out of leaving Belinsk once you've made it back into town, rendering all of the following features unavailable:
- Storebought gear between Te Rya Village, Border Town, Port Rago, and Saha Town, which include:
- Interact with shopkeepers in the following settlements to add Artifacts to menus:
- Te Rya Village for the Frost Wand
- Border Town for the Knight's Greave, a Mist Potion, and a Water of Life
- Port Rago for the Angelic Ankh, a Potion, a Psy Crystal, and a Water of Life
- Saha Town for the War Gloves, a Psy Crystal, and a Water of Life
- Collectibles in Craggy Peak Ruins, which include:
- Jupiter Djinni Doldrum in the Taurus hall
- Spiked Armor in a chest in the Aquarius hall
- Grievous Mace in a chest in the Cancer hall
- Vambrace from a statue in the Scorpio Room
- Lure Cap dropped by a Mimic in the Capricorn hall
- Moloch's summon tablet in North Wall Shrine
- Collectibles in Te Rya Village, which include:
- Mars Djinni Fury behind a sheep that needs the torch to be lit
- Apple in a pot in the north house
- Nurse's Cap in a cabinet
- Collectibles in Teppe Ruins, which include:
- Mercury Djinni Dewdrop, requiring the Trusty Staff sold in Te Rya Village
- Venus Djinni Vine late in the dungeon
- Mint hidden on the grassy roof, requiring Track Psynergy
- Sword of Dusk in a chest
- Warrior's Helm in a chest
- Mythril Circlet in a chest
- Water of Life in a chest
- Mythril Silver in boulder that can only be opened with the Crush Psynergy
- Venus Djinni Gears north of Border Town by the sea in the overworld
- Venus Djinni Furrow on tiny island to the right of the exit of Teppe Ruins in the overworld
- Ulysses's summon tablet in Border Town Mine
- Collectibles in Border Town, which include:
- Jupiter Djinni Sirocco in a cabin, reached by climbing down from the roof
- Haures's summon tablet in the dream version of Border Town, reached only by using a Dream Leaf at the inn
- Collectibles in Port Rago, which include:
- Mercury Djinni Coral in Port Rago Canal
- Hard Nut in a chest floating in the ocean left of the town, reached though Port Rago Canal.
- Lucky Pepper in the oven in the inn
- Power Bread in a barrel at the upper-left corner of the cannon deck in Briggs' ship
- Zodiac Wand in a chest in Briggs' ship
- Planet Armor in a chest in the docks
- Quality Zol in a chest in Port Rago Canal
- Collectibles in Saha Town, which include:
- Jupiter Djinni Wisp in Saha Cistern
- Cookie behind a tall, movable crate in the northeast residence
- Collectibles in Kolima Village, which include:
- Venus Djinni Garland in the branches above Kolima Village
- Apple in chest left of the Dream Leaf merchant, reached by entering tree from behind
- Safety Boots in a chest in the branches above Kolima Village
- Ninja Garb in a cabinet in the Dream Tree
- Virtuous Armlet in a chest in the branches of the Dream Tree
- Collectibles in Phantasmal Bog, which include:
- Mars Djinni Glare in the rolling log puzzle room
- Mint in a chest, while the dungeon is dried
- Giant Axe in a chest
- Faery Vest in a chest
- Collectibles in Kolima Forest, which include:
- Mercury Djinni Teardrop at Kolima Junction
- Collectibles in Talon Peak, which include:
- Jupiter Djinni Puff, after the Mountain Roc battle
- Cookie in a chest early on
- Sylph Rapier in a chest
- Aura Gloves in a chest
- Collectibles in Belinsk Ruins, which include:
- Venus Djinni Chasm in the giant early screen
- Lucky Pepper in a chest
- Storm Gear at the west end of Belinsk's outdoor area, reached by taking the other exit from inside Belinsk Ruins' entrance area before the first Magma Shard gate
- Water of Life in a chest
- Psy Crystal in a chest
- Mist Potion in a chest
- Quality Zol in a chest
- Hagbone Mace in a chest
In addition, two Encyclopedia entries will only be able to be filled in at locations that become inaccessible once the Alchemy Dynamo is approached. The entry for Lord McCoy can be gotten at Border Town, and the entry for Mercury Lighthouse can be gotten by reading a bookcase in the newly awakened Dream Tree. (Both of these can be added earlier at either Patcher's Place or the Psynergy Training Grounds.)
Late in Belinsk Ruins, there is a segment where Slapping a sun-like object will initiate a ride downwards into the basement while a starry nightscape surrounds Matthew. This causes all the lesser, colored orb-shaped platforms to stop spinning around the center gold pillar, which has the effect of permanently locking you off from the upper two elemental chambers and the top chamber that came shortly before hopping to the sun. This has the effect of rendering the Potion in the lower-left corner of that top chamber permanently missed.
Fighting Gloom Skorpnas at Belinsk's dock
When exploring and fighting through Belinsk while the Grave Eclipse is just beginning to encase a large swath of it in a dome of darkness, you can still explore the various buildings and buy from vendors. At the dock at the northeast end of Belinsk, Eoleo will jump onto Briggs' ship but be faced with a trio of Gloom Skorpnas; you can still leave the screen and explore Belinsk, but this option will be taken away the moment you hop the gap onto the ship and automatically initiate the battle with the Gloom Skorpnas. This will render all of the following features unavailable:
- Storebought gear at Belinsk, which include:
- Interact with shopkeepers in Belinsk to add a Potion, Psy Crystal, and Water of Life to Artifact menus
- Collectibles in Belinsk, which include:
- Crystallux, which you can summon after defeating the optional Dark Devourer battle in the opera house
- Mercury Djinni Spout in the east, unofficial "entrance" into Belinsk Ruins accessed through the building with the Healer
- Mercury Djinni Pincer now available in the west building in town by prompting an elderly man to spill a puddle in front of a fireplace
- Power Bread in a barrel at the bottom end of the same room as Pincer
- Power Bread reached by the raft near the newly raised Luna Tower
- Apple in the jar in Hou Ju's cell
- Beast Knuckles atop Belinsk Castle
- Assassin Blade in a chest in Belinsk's library
- Muni Robe in a cabinet in town
Even after initiating the Gloom Skorpna battle, there will be a brief window of opportunity where you can still explore the screen of the dock where the ship is moored before setting off for the Eastern Sea. The following collectible can be reached even at this late point, but will be permanently missed if you set off without it:
- Mercury Djinni Torrent in northeast port screen, requiring Move and Cold Snap to reach
Reaching Coatlicue
When exploring Harun Channel from the direction of the Warrior's Hill dungeon, you will need to cast Crush on a boulder to allow the running water to flow, which effects a permanent change to the dungeon's layout. If you do not move a nearby earth pillar flush against the wall to its right before crushing this boulder, you will permanently lock yourself out of being able to reach the Coatlicue summon tablet, which requires you to take the route from Harun Channel's entrance in the overworld south through the underground channel by hopping across this earth pillar.