You need to unlock his dungeon and then get to the top floor and beat him until he joins.
Hope This Helps
Darkuslord
you keep trying by repeatedly going to his dungion
it's the same as the pokemon mystery dungeon red rescue team. you can find mewtwo in the western cave once you recruited ho-oh.
the most powerfull Pokemon is mewtwo but people think its areceus when its not on Pokemon explores of time it is darkrai on darkness it is mewtwo on platinum it is mewtwo on dimond it is mewtwo on pearl it is mewtwo on blue rescue team it is mewtwo on red rescue team it is mewtwo on chores black it is mewtwo on ruby it is once again mewtwo i could go on for ever but i am trieng to make my point :)
he's in western cave
while you are going to become the strongest, but the Pokemon other than you is mewtwo
99 and at the end is mewtwo
to get mewtwo in red rescue team or Pokemon leaf green or fire red?
jirachi
I got it by distroying the meteor then talk to medidite then lombre
Mewtwo is on the 99th floor of western cave
how do you evolve golbat in pokemon blue rescue team
No. Pidgey is unobtainable in Pokemon Mystery Dungeon Blue Rescue Team.