Kakusei Sol and Kakusei Ky:
Play Scramble in RK II Factory under the normal difficulty setting. Finish the last stage with a score of 1,500,000 or greater. Robo Ky II Substance will appear. Defeat him to unlock Kakusei Sol and Kakusei Ky.
Ex characters:
In arcade mode level 100+, Ex characters will challenge you. Defeat them to unlock them.
Leopaldon:
In arcade mode level 199, defeat Leopaldon to unlock him.
Zako 1, 2, and 3:
In GGBoost, defeat Kakusei Sol and Ky in the last stage to unlock them.
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