Isaac peeked into the wardrobe... There's a silk negligee. Isaac! Put that back!
Isaac primarily uses Venus Psynergy, which includes moves such as Move, Grow, Carry and Cloak outside of battle. In battle, Isaac can use a variety of devastating attacks such as Spire, Quake, Briar, Avalanche, Gaia, Cure, and Ragnarok.
Matthew is Isaac's son introduced in the third game, Dark Dawn. He shares similar characteristics to Isaac, including blonde hair and the preference of swords. Matthew can utilize the powers of Venus Psynergy just as his father can, and serves as the main protagonist of Dark Dawn.
War With ShulkEdit
For some reason, Isaac is at war with Shulk. No one knows why, but for some reason only one of them can get in. Despite Isaac having more games, seniority, and better sales, Shulk is a more popular choice, meaning he's a shoo-in and Isaac isn't. It must be because they're both blonde-haired swordsmen with magi- wait, Robin's that too. Well, then, Shulk and Isaac are both out. Sorry guys. Isaac and Shulk can't coexist, and Isaac, Shulk, and Robin can't coexist. But Shulk and Robin can definitely coexist.
Role in the Super Smash Bros. Series Edit
Isaac was an Assist Trophy in Super Smash Bros. Brawl. Hope for him grew when Little Mac was revealed to be playable, for obvious reasons.
And then it turned out that not only was he not playable, but his Assist Trophy was cut as well. And there's not a single piece of Golden Sun content in a handheld-centered Smash Bros. game at all.
But despite that, Golden Sun still got new content in the form of Dark Dawn's overworld theme. Hope for everyone's favorite blonde-haired swordsman may not be dead yet...
Isaac was a popular choice pre-Brawl, but ultimately, he only made it in as an Assist Trophy. He slowly regained it over time, and it really grew once Little Mac was revealed, as mentioned above. Once the ballot was annoucned, Isaac's popularity skyrocketed him to the top three of the board (along with K. Rool and the Inklings, veterans notwithstanding). After the latter two were revealed to be costumes, Isaac ended up filling the void left by K. Rool, turning him into the new Ridley; though not as popular as the Kremling king, all of the detractors, needing to be fueled by attacking someone else's personal tastes, flocked to him. A few, for some indescernible reason, even attempted to start a Golden Sun vs. Earthbound war, but it never panned out, fortunately.
He's assumed to be relatively popular on the ballot as he consistently places highly in "which character did you vote for" polls. For example, in a poll of 481 people, he placed first.
- SleepyMunchlax1, but he only does it for his best friend, IRL. He does have interest in trying Golden Sun though.