How do you beat the 51 event match in super smash bros melee

To beat the 51st event match you need kirby. First float up into giga bowsers head and use the down+b move. Keep on doing that. After that you will have to deal with mewtwo and gandondorf. Some people say you have to float off the cliff and gandondorf will trie to grab you. But he didnt trie grabbing me. I took him and mewtwo out by and. I used the flower thing that put flowers on their heads to kill them.