 If you liked
Sousei no Aquarion
|
 ...then you might like
Kenran Butou Sai: The Mars Daybreak
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Both shows are about Mecha (robots), Action and Romance, both have a boy who was living on the streets becoming invaluable when it came to piloting the robots, both are english dubbed so use same or similar english voice actors for both shows so if you liked one you'll definately like the other ^.^