You were playing a specific arcade game back at Inkwell Isle. "Carn-Evil" (bad reference, I know), it was called. You played a few rounds and got pretty good at it, but you lost the game when you got to the fourth part. The Devil suddenly appears in a puff of smoke, now leaning against the same machine you played on.

The Devil: he clicks his tongue and shakes his head Tough luck, kiddo. You've got to put your skills to the test. He says in a mocking tone How about this. You can try playing my game again. If you succeed, you'll get a prize! If you don't, well.. You'll still have a reward, but it'll be one I get to choose.. he smiles creepily for a moment Have we got a deal? He says, putting on an innocent act once again.