Invincibility In Multiplayer Mode:

This trick only works in Multiplayer mode and only stays effective for that level. When you leave a part of any level, your party will be with you no matter where they were before you left that part of the level. For example, if your friend or ally jumps off a cliff and you leave that part of the level as he dies, he will appear next to you with no hearts. He or she cannot be killed by anything except falling and/or stepping in the quicksand or deep mud from Degobah. This effect will end if you die from falling or switch characters. This can be repeated as many times as desired.