Pick these characters
1. Young Link
But u need all ur friends to do this hint. The computers wont do this hint. So put the item only on machine gun only. Then Young Link has to shoot several times at Falco, and Falco has to use his reflect shield to aim it at fox, and fox has to use his reflect back at Falco, Falco, and Fox has to keep using reflect at each other, or you'll have to start all over again. Then Peach has to use her vegetable throw like 5 times in the middle of the reflects, and if u go in the reflect/vegetable trap, your HP will go to 999%, that's a ultimate KO!!!