I have a sick moveset idea for doubles and it requires Switcheroo, but if I could get Headbutt on Ambipom it would be even better because of the STAB flinch-rate. Unfortunately, Switcheroo isn't an EM in Gen 4 where Ambipom can learn Headbutt via Move Tutor... Is it in anyway possible to get both moves without hacking?
I don't think so, but I'll ask anyway out of desperation :P