whats happend?

You want mewtwo pichu and falco it's easy mewtwo unlock as hard ill tell you how to unlock him 1: go to melee mode 2: setting notime limits and alot of acttack power 3: pick 2 people on your side (to get them in you're side go to the top right press A then teams show up)then pick one opponent simple 3 kirbys vs 1 kirby kill alot each other like 6 or 7 or 8 or 9 times (make sure you're partners are in level 8 and you're oponent level 9) next falco go to one player mode 100 man melee kill them with dk then you battle him pichu you have to do is finish mission #37 finish it then it acttacks you but use you're good character but doing number #37 is hard you have to use pokeballs to kill them.

Umm iam not sure idont thin kthe 700 or 800 matchs thing work and I think you have to win every one. But it's easy to get him all I did was start a match with 2 controllers then pulled the sencond controller out overnight and around after noon or whenever I started playing again I won that match then fought him I don't know how you cannot unlock falco man you just do 100 man melee or whatever for that pichu.. Umm wow I actully don't remember how to get him

I don't know how you could even delete your characters without deleting everything else. But I suggest starting from scratch.

I am not positive but I think when you delete anything accecpt the whole game you can't get it back. If you have unlocked other characters then I am wrong but if you can't unlock anyone then you might have to delete the whole game and start over

I did this: go to melee vs. Mode and leave it there for twenty hours
Make sure that the character you chose can beat mewtwo. When/if you
Do this do not pause the game or the time that it was on won't count.

Play for a combined total of 20 hours then you can fight. It will take time but it's worth. As you reach the 20 hour limit you have to beat the match that hit the mark. If you lose against mewtwo just play 1 minute and fight him again.