I think it can be recruited in blue rescue team
you get it autonatically when you recruit Ho-Oh
about 90%
Mt Faraway 40F
recruit him and ull getwestern cave his chance of recruiting is 99.9 % so get him
Rainbow Peak.
mt.faraway
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.
ho-oh is Fire-flying so use electric, rock or water-types to beat him.
You get it at Mt.Faraway (Where Ho-Oh is) on the thirtyth floor also, you can get in in tiny woods rescue reward with wonder mail.
you have to get ho-oh on your team
only use your water type pokemon that is level 40 or even higher than 40
You meet Ho-Oh