 If you liked
Aquarion Evol
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 ...then you might like
Yu☆Gi☆Oh! Zexal Second
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Yu-gi-oh! Zexal Second's group of antagonists-"barians" are extremely similar to altarians. Nasch and Yuma's relationship is quite similiar to Jin and Yunoha's, as they both end up being seperated just because they're from different worlds. It also has quite a sci-fi theme, but instead of card games they fight using robots.