Rocket Knight Cheats

Unlock all Characters:
At the Press Start screen, press Up, Up, Down, Down, Left, Right, Left, Right, Circle, X, X.

Unlock Axel Gear and Gold Sparkster:
Complete Arcade Mode on Hard to unlock Axel Gear and Gold Sparkster.

Bronze:

Elhorn Tourist
Objective: Completed all stages

Zephyrus Saviour
Objective: Completed Arcade Mode on Normal

Ferocious Flier
Objective: Completed 1.2 having defeated all enemies

Wolf Connoisseur
Objective: Completed 2.1 having collected all pickups

Nimble Knight
Objective: Completed 3.2 without taking damage

Burst Friends
Objective: Defeat 5 enemies in a single Rocket Burst or Drill attack

Woodland Bouncer
Objective: Defeat 3 enemies with a single reflected projectile

Silver:

Devotindos Defiler
Objective: Completed Arcade Mode on Hard in a Single Playthrough

Impatient Hero
Objective: Completed all stages below par time

Spark Dog Millionaire
Objective: Completed Arcade Mode scoring One Million Points or more

Redoubtable Runner
Objective: Completed Arcade Mode on Hard within 60 minutes

Gold:

Legendary Possom
Objective: Completed Gold Sparkster Mode