When Sonic Team throws a party, you just never know who is going to show up! Amigo the monkey and NiGHTS join Sonic and his friends for some lively pinball competition, multi-player party games, and of course, lots of ring gathering. Once you've built up a nice pile of rings, head to Casinopolis for Roulette, Slots, and Bingo. Each ring converts to a ball, so the more rings you have, the longer you can play! Where there is Sonic, you know Dr. Eggman is not far behind, and you'll have plenty of opportunities to take down the evil doctor in Egg Mode or Story Mode with your pinball wizardry.