Well I was looking up a moveset for my Crobat I thought that Giga drain might be a good move to have but how do I get Giga drain onto crobat through breeding?
Get a Natu, Xatu, Woobat, or Swoobat that had learned it from a move tutor in B2/W2 and breed it with Crobat. If you can't, you need to get a Crobat that has learned it via TM in Gen 3-4, or by move tutor in Gen 5.
