Fizz

Fizz (フィズ Fizz) is a Mercury Djinni found in Golden Sun and Golden Sun: The Lost Age.

Fizz is the first Mercury Djinni in the original Golden Sun, and can also be  acquired in Golden   Sun: The  Lost Age. Although it is not the party's first Mercury Djinni in The Lost Age, Fizz is still ordered as the first Mercury Djinni when  equipped to characters. Because it is not available until after most other Mercury Djinn can be found, however, the separate Djinn list  viewable with the Select button from the status screen lists Fizz and  all other Mercury Djinn from Golden Sun after all of the Djinn introduced in The Lost Age. According to this order, Fizz is the twelfth Mercury Djinni in The Lost Age rather than the first, but this order has no influence elsewhere in the game.

Basic description

 * "Restore HP with calming water."

When Set, Fizz increases its Adept's base HP by 9 and base Psynergy Points by 4, and base Defense by 3.

When Fizz is unleashed in battle, a targeted non-downed Adept on the player's side is cured by an amount equal to 60% of their maximum HP.

In   Golden Sun and The  Lost Age, Fizz's unleash  animation  visually resembles a blue image of a Mercury Djinni floating above the targeted Adept while a small collection of blue sparkles gathers into the target from above.

Locations
Golden Sun: Fizz is a Djinni that is automatically handed to you as you play through the game, being present on Mia as soon as she joins your party in  Mercury Lighthouse somewhat early on in Golden Sun. Aside from Flint, Fizz is the only Djinni in the game that is impossible not to  obtain.

Golden Sun: The Lost Age: Players can transfer data from Golden Sun   to The Lost  Age,  but even  if they don't, Fizz will be among the Djinn Isaac's party has with  them when they join forces with Felix's party late in the  game.

Analysis
General: While there are very few healing effects in any of the games that restore HP based on a percentage, Fizz is generally the least useful because other Djinn that heal by a percentage either heal by a larger percentage or offer some separate advantage to make up for not healing as much, like group healing or acting with increased priority. Unless you are planning to set up for a Mercury-element summon by unleashing Fizz to heal an Adept's HP, the Ply Psynergy series is overall better despite the PP cost. In Dark Dawn, the Venus Djinni Garland is this Djinni's identical equivalent.

By game
Golden Sun: While this may appear practical as a battle option, Fizz isn't very useful because of the abundance of easy-to-use and direct healing items and  Psynergy available. And while Fizz's is one of the only effects available that cures HP based on the maximum HP meter - making its worth  grow over the course of the game as the Adepts gain more HP - the  party's items and Psynergy augment as well. There will be cases where using Fizz won't cure as well as a dose of Ply  would, and that it saves a little PP does not seem enough of an  advantage to make up for that. Nonetheless, it must also be said that it could be used simply because it is a Djinni, and therefore more helpful  than any healing Psynergy when the player is setting up for a  summon. This point is noteworthy during the battle with Saturos on Mercury Lighthouse, where Fizz's user can heal and partially set up  Nereid in one turn. To compare, it heals about 70 HP to 100 HP when it is first attained. At the end of the game, it heals about 280 HP to 400 HP, and even higher should the party decide to level up past level 40.

Golden Sun: The Lost Age: When Isaac's party joins Felix's party along with their returning Djinn, Fizz's effect is nearly worthless because Spring, which is  automatically acquired much earlier in the game when Piers joins, recovers HP by an amount equal to 70% of the target's maximum HP. And Spring itself is impractical by this point because of the availability of the Aura Psynergy series and Wish Psynergy series, the availability of Vials and Mist Potions in stores late in the game, and that there are healing Djinn like the Venus Djinni Crystal, which heals all current battling Adepts by 50% of their respective maximum HP meters.

Name Origin
"Fizz" is the bubbles in carbonated water. The Mercury element is associated with water.