How To Train Your Dragon 2

Finish a five event tournament in first place riding as Ruffnut & Tuffnut/Barf & Belch. This is probably easiest on the first tournament, but any one will do. If you are ever doing poorly in an event, you can always press and restart the event to improve. Also playing the tournament in splitscreen will leave less competition to beat (in fact for some reason your second controller will actually come in 4th in most races despite never actually finishing).