 If you liked
Code Geass: Hangyaku no Lelouch
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 ...then you might like
Katekyou Hitman Reborn!
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These anime have similarities because both fight to overthrow an organization or a government and gain beastly power during the process. Katekyo Hitman Reborn is more comedic and has more variety of powers while Code Geass is a very serious anime and mainly focuses on the main character's power of the Geass.