[Meta thread] Iron's PokeRole Adventure: The Skull Ruins

[Dragonstrike]

That's a fairly expensive gimmick, though. Might want to learn some less gimmicky moves first. Though you shouldn't have to worry too much about Phantump getting a Grass STAB, since it learns Horn Leech as soon as it evolves (which you can immediately do without too many drawbacks as soon as Phantump reaches 3 loyalty).