Sonic Pocket Adventure (1999)

Some time after the Angel Island incident, with the Death Egg finally destroyed and the Master Emerald safe, Sonic parts with Tails and Knuckles to explore new territories on his own. Meanwhile, a vengeful Dr. Eggman has taken new measures to defeat his arch-nemesis by enhancing his past creations and mechs.

The important thing that happens in this game is that the cast is given their modern designs. At the beginning of the game Robotnik has his classic design but once Sonic reaches his final base, he changes to his modern design. It is also worth noting, in the main menu Sonic has black eyes and once you enter gameplay, they change to green, which is now a staple feature of the character.

Optimal way to play: Neo Geo Pocket Color

Other ways to play: None