Sonic Advance 3
Sonic Advance 3 was released in 2004 for the Game Boy Advance. It is the final game in the Sonic Advance series. This game added a fresh new approach to the series in which you can pair two characters up as a team. Depending on who you choose, you get specials abilities from picking the other character up with the R button. You must start out the game as Sonic & Tails, but as you advance through, you can unlock Knuckles, Amy, and Creme.