well, mewtwo IS mewtwo. i have to say i was impressed that even after all this time mewtwo is still the strongest. sure deoxys in attack form does have higher atk/spatk BUT mewtwo is well rounded and can take more hits.
itoday i was thinking about how someone could go about training a smeargle in real life, which is kind of where my inital idea came from. 2 methods, the short term is ditto. in the manga green showed her ditto mew to transform into it to distract TR goons but it wasnt clear if ditto could use mews attacks or if it just transformed. reasoning does say it should, but should is a funny world in life. the 2nd, a pokemon with metronome. the odds of ditto doing something like roar of time or dark void would be slim, but still it would be a method to get smeargle to see the "legendary" moves.
to further enhance smeargle in the game, they should spinda it, but change the color of its paint. the pokedex would show it with white paint though.