|Achieved By|| Obtaining 6 Chaos Emeralds and the energy of a Time Stone
Having 50 Rings
|Forfeited By||Having 0 Rings|
|First Appearance||Sonic CD 2|
In Sonic CD 2, Sonic, having all 6 Chaos Emeralds collected, chases after Robotnik to the Nuclear Nucleus, the source of Robotnik's ultimate weapon's power and where the Time Stone shard resides. Sonic meets up with the doctor and Metal Sonic. Harnessing the power of the Chaos Emeralds and having the shard nearby transforms Sonic into Galactic Sonic, and battles against Robotnik and Metal Sonic one last time. Sonic successfully defeats both of them, and restores peace for South Island.