The Showdown

The final event match is another epic battle on the Final Destination. Giga Bowser is the most dangerous opponent by far, so defeat him first. There are two ways to do this:

Yoshi - Use your B-down Yoshi bomb special attack on Giga Bowser. Then quickly jump and flutter away. Once Giga Bowser is 100% damage or higher, smash him off the stage. He can also be KOed with Yoshi bomb when he's 150% damage. Rinse and repeat until he's defeated.

Jigglypuff - Jump high above the stage. Then, rest on Giga Bowser's head with B-down. 2 rests should KO him.

After Bowser is defeated, the battle will slow down dramatically. Mewtwo and Ganondorf will mostly just follow each other around. Neither Yoshi Bomb nor rest will be effective against these small targets. Don't get tempted to fight them head on, since they have overwhelming teamwork. Sometimes, Mewtwo will push Ganon towards you while he's charging up his big Warlock punch or his volcano kick. Avoid these two moves at all costs! It is best to continue avoiding the opponents entirely unless you have an item. If you're using Yoshi, throw eggs with your B-up special attack. After Ganondorf or Mewtwo is KOed, you should be able to defeat the final opponent head on if you practice extreme caution.