After persuading Selphie to betray Riku and Sora and join them, the Crabs arrive at Riku's hiding place, the broken bridge. Wakka and Tidus try to knock Riku into the water while staying dry themselves on stilts. Sora easily dispatches Selphie and Kairi, while Riku manages to knock Wakka and Tidus off balance, making the Crabs lose the game of Island War.
Later, Wakka and Tidus have a play-battle against Riku, two-on-one.
Wakka fights alongside Tidus and Selphie in a play battle against Riku, but all three are defeated easily.