Do you mean Castle Crashers? I don't know if it still works, but you can do some serious power leveling using the Corn Boss. You need to be able to fire arrows at an FREAKISHLY fast rate (very high stamina and the use of a stamina boosting sword, like the stick). You go to the boss and just keep firing arrows into him. If you can keep him stationary with his husk up, you will just keep gaining experience. You can even keep him alive even when his health reaches zero. Just keep shooting and enjoy the levels. Another cheat (more of a glitch, really): If you are fighting someone in the Barbarian Boss stage (the duel after defeating the boss), then have someone stand against the bottom of the screen, right in front of the barbarian with the pennant flag (foreground, near the left). Then go to the lower left corner and start walking into the left-hand wall. After a few seconds, hit Y and you will dive. If the other guy is in the right place, he will get hit by you, even though he is no where near you.
