Would breeding pokemon outside of your chosen type, Bug, be against the rules?
If not, maybe you could breed a Electabuzz with Thunder (Human-Like) with Volbeat or Illumise (Bug/Human-Like) egg-group to get one of those two bugs baby with Thunder. And then breed that one with Galvantula to get a baby that knows Thunder?
Could someone double-check my thinking?
EDIT: Ugh, I just realized the topic is kinda old now... Apologies.