Sonic the Fighters

Stage 1 Complete

Complete Stage 1 of Arcade Mode (any difficulty)

Stage 2 Complete

Complete Stage 2 of Arcade Mode (any difficulty)

Stage 3 Complete

Complete Stage 3 of Arcade Mode (any difficulty)

Stage 4 Complete

Complete Stage 4 of Arcade Mode (any difficulty)

Stage 5 Complete

Complete Stage 5 of Arcade Mode (any difficulty)

Stage 6 Complete

Complete Stage 6 of Arcade Mode (any difficulty)

Stage 7 Complete

Complete Stage 7 of Arcade Mode (any difficulty)

Perfect

Win a round without receiving any damage in Arcade Mode (any difficulty)

Barrier Destroyer

Destroy all of an opponent's barriers while playing Arcade Mode or Offline Versus

A Small Transformation

Turn small by being attacked (ie, by Amy's↓+P, etc) in Arcade Mode or Offline Versus

Honey the Cat

Use Honey the Cat in Arcade Mode or Offline Versus (Press START button on Amy and select)

The Enemy Within

Fight a mirror match in Arcade Mode or Offline Versus