Well, you don't use it. Your chao do. It is up the the CPU to decide whether or not the chao will use it. You cannot force it to use it.
Chat with our AI personalities
i think he could do light speed attack on sonic 2 battle
You use it to beat the game easier
Use action replay
Sonic Adventure DX is a popular game across many platforms. It is possible to use Action Replay codes in the game to do various different cheats.
Find a fish and use final slash on it.