Okay, start out with two players on VS. mode. You can be anyone you want. Pick Ness as second player, (not a human, please!) For a stage pick Jungle Japes. DO NOT MOVE! Ness can be on any level, but DO NOT MOVE! Ness should jump, then do his second jump, then fall in the water. Put the mode on stock and then one life. A good way to unlock charactures.