Sheep - Platform: Gameboy Advance Unlock Alternate Sheepdogs: --------------------------- To unlock the Gray Collie, complete Arrange Mode on any difficulty, using Collie. To unlock the Brown Border Collie, complete Arrange Mode on any difficulty, using Border Collie. To unlock the Black Piglet, complete Arrange Mode on any difficulty, using Piglet. Piglet sheepdog: ---------------- Successfully complete normal mode.