for green and red, you can catch a bunch of red-striped basculin.I'm not sure what I would even give out on Wonder Trade that is better than the Froakie breeding "rejects" (Timid/Protean) I'm already spitting out.... maybe a Pokemon that is green and red? Are there any?
LOL, maybe I should try to breed a shiny Abomasnow :)
EDIT: Oh, you mean actually buying the game.... I don't think anyone I know needs a copy.