Earn a "Gold" rank in the Series era to unlock the following characters in Arcade and Multi-player modes. The character unlocked varies depending on things done during game play.

Black Ranger
Blue Ranger
Green Ranger
Lost Galaxy
Mighty Morphin
Ninja Storm
Op. Overdrive
Red Ranger
S.P.D.
Time Force
Wild Force
Yellow Ranger

To unlock the Omega Ranger, complete a level and replay it. Collect the three hidden Omega Crystal pieces in the level. The Omega Ranger is unlocked when all Omega Crystal pieces in every level are collected.

To unlock the Orange Ranger, get a 100% "Gold" rank in all eras, including the Hall of Legends Era.