Can I pass Giga Drain down through breeding a male Ariados with a female Larvesta to get a baby Larvesta that knows Giga Drain? I'm desperate for an awesome Volcarona.
Please help me.
No, because Larvesta can only learn Giga Drain via move tutor in B2W2, and move tutor moves are exclusive unless they're also listed in egg moves. It has no way of learning Giga Drain in BW.