So some ideas i guess (and in spectacular poor english as well) :
Tauros crest: Summons gen 1 field or whatever it's called (it works as desolate land were when he is in the field its activated and it imeadiatly disappears when he exits) as well as a slight power buff- as one of the main heads of gen 1 this guy has really fall of since then, but i think this would be really interesting for him as gives him a really spammable move in hyper beam as well as a usable special attack, this would also help it a lott in doubles as he would enable completely different stratagies.
Slaking