You simply do what the event tells you do, mostly its gonna tell you to fight some other character sometimes its something more challenging like grab 300 coins and make sure luigi's mansion doesn't get destroyed at the same time!
you have to beat event match 25
Beat the legendary Pokemon event match then defeat pichu.
beat the event match called legendary Pokemon
beat event match 29
I don't remember which one but you have to do an event match and beat him. When you beat him you can fight him again to unlock him.
beat event match 37, "legendary pokemon"
Of course! John Cena beat him at a WrestleMania match (although, I'm not sure if it is a WrestleMania match but I'm sure he beat him at a match..). Other superstars had beat him too!
Beat the game and beat the Hades Cup and Gold match (Ice Titan)
After beating SSE (subspace emissary)replay the swamp and enter this midair door after fighting this Diddy kong or beat event match 1-20
no match box did not beat mike Tyson
yep
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.