Giant Axe

A Giant Axe (Gigant Axe in Japan) is an axe found in both Golden Sun games. They are occasionally dropped by Earth Golems in Suhalla Gate and the exit of Venus Lighthouse in Golden Sun, and in Treasure Isle in The Lost Age. Being an axe, it can be equipped by Isaac, Felix, Garet, and Piers.

The Giant Axe increases the wielder's attack by 114. Its Unleashed power is Meltdown (Melty Armor in Japan), which adds another 47 damage points, converts the damage from physical to Mars, and attempts to lower the target's defense by 25% (this effect can stack up to twice). It has the standard base unleashing rate of 35%. Meltdown appears as the axe strike creating a cloud of fluid, wavering Mars energy and the Impair graphic effect of a breaking red shield on the victim. It can be bought for 14000 coins and sold for 10500 coins.

RNG methods
One available process to get a Giant Axe in the original Golden Sun:

First of all, make sure that you have all 28 Djinn, with all of the Djinn of each element set on the appropriate character so that they will be in their mono-elemental classes (Venus Djinn on Isaac, etc.). Ivan needs to be the character with the lowest agility, while still being above 150 - putting all of Ivan's Jupiter Djinn except Gust on Standby helps, as does giving agility-boosting equipment like the Ninja Garb to other characters.

Proceed to the room in the lower "exit" area of Venus Lighthouse that has a giant statue of a goddess and glowing circular tiles on the ground. Now save, turn off the game completely and then turn it on again. After that run around the Goddess room and get into a battle; it should be with an Earth Golem, a Nightmare, and a Horned Ghost. Now follow the next steps:

— Isaac uses Clay Spire, Garet uses Flare Wall, Ivan uses Tornado and Mia uses Ice Horn. All the attacks have to be concentrated on the Nightmare. The Nightmare and the Horned Ghost should die. The Earth Golem shouldn’t attack you.

— On the next turn, Ivan uses Gust to attack the Earth Golem and everyone else defends. The Earth Golem should die.

If done correctly, a Giant Axe should be awarded along with the experience and coins.