Wakka is a resident of the Destiny Islands and a friend of Sora, Kairi, and Riku. He spends a lot of time with Tidus and Selphie, and treats them just as a big brother would. He and Tidus expressed their curiosity over the Secret Place, and were thinking of exploring it.
Like Selphie and Tidus, Wakka appears in Sora's Dive to the Heart on the Destiny Islands area. His question, "What do you want outta life?" also helps determine the leveling pace throughout the rest of the game. Sora can answer with either A) to see rare sights, B) to broaden my horizons, or C) to be strong.
He can be fought while on Destiny Islands. He uses his Blitzball to attack as he did in Final Fantasy X (thus requiring the player to deflect Wakka's Blitzball back at him), but this one lacking the bumps and Spiran script for the word "Blitzball" of the original Blitzball. Nevertheless, this makes him, out of all the Destiny Islands and Twilight Town Final Fantasy characters, the only one to use the exact same weapon as his original incarnation.
After Destiny Islands is destroyed, it is unknown what happened to him.
He is last seen playing with Tidus and Selphie after the island was restored in the end credits.