Is Danball Senki hentai?
English title: LBX: Little Battlers eXperience
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

TV · 2011 · 44 episodes · G - All Ages
Kids, Mecha
In 2046, a revolutionary 80% shock-absorbing reinforced cardboard has been developed, rapidly transforming the world's exports. The reinforced cardboard would soon become the battleground for a popular children's hobby called "LBX" (Little Battler eXperience). Four years later, a boy named Yamano Ban who loves to play with LBX (although without a mecha himself) is given a case containing the model AX-00 by a mysterious woman. He is told that he now holds the hopes and despairs of mankind in his hands.
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