Astro Boy - Omega Factor - Platform: Gameboy Advance

Completion Bonuses:
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Successfully complete the game to unlock options for stage
select, sound test, and event test. Successfully complete 
the game two times and wait after the credits complete for 
a sequence that unlocks Sharaku Hosuke as a selectable 
character. 

Unlock Sharaku Hosuke:
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Successfully complete the game two times and wait after the 
credits complete for a sequence that unlocks Sharaku Hosuke 
as a selectable character. 

Unlock Stage Select Mode:
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Unlocks the stage select option from the pause menu. Astro Boy 
can still build up his stats and even meet new characters. You 
have to Beat the game in normal mode.