Cheat for Sonic Adventure

Well, this isn't a cheat but a useful tip. When playing as Big the cat you can get the thing that makes you float.

Once you have it go try beating a level and when you fish, instead of standing on land and throwing you line way out you can go into the water and float.

While floating you cats your line from any where and it makes it easy to catch fish or Froggy.

More tricks, tips and cheats for this game are right here - Sonic Adventure cheats