Isaac is a playable character in the fighting video game, M.U.G.E.N Trilogy. He was confirmed along with many other characters who could have been confirmed in the Super Smash Bros. series on September 13, 2019. Aya Hara (Japanese) and Darcy Maguire-Wheelhan (English) provide the role for Isaac in this fighting game.
Isaac originally appeared in Golden Sun, an RPG-style game for the GBA. The game focused on Isaac and friends' quest to retrieve the four elemental stars and stop the return of Alchemy, following their theft by the games' first two antagonists, Saturos and Menardi. Isaac is the main playable character in the game, and he is one of the four playable characters capable of wielding Psynergy, a form of mind power. Isaac is a Venus Adept, meaning he can manipulate Earth and plants. As the game progresses, Isaac and friends gain access to a wider variety of Psynergy necessary to progress through the game.
Isaac returns in the game's sequel, Golden Sun: The Lost Age, but instead appears as one of eight party members led by the game's protagonist, Felix. This game explains the story from Felix's point of view, and focuses on Felix and the full party as they are forced to return the flow of Alchemy to save their parents' lives, which are being threatened by the game's new antagonists, Karst and Agatio, as they continue what Saturos and Menardi could not after their death in the first game.
He also briefly appears in the most recent game in the series, Golden Sun: Dark Dawn, this time as the father of the main character, Matthew. While he joins Matthew's party at the beginning of the game, he is not seen for the rest of the game's plot.
The Psynergy that Isaac uses in Super Smash Bros. Brawl is called Move. It is a Utility Psynergy - that is, it cannot be used in battle, and it is acquired virtually at the start of the game. "Move" is used primarily to move heavy objects to solve puzzles. The use in Brawl is somewhat different; while it does move obstacles, it simply pushes them away in order to achieve a wide variety of different ends.
How to Unlock
Scan Isaac's AR Icon from the M.U.G.E.N Trilogy website.