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Aoi Sekai no Chuushin de Description:

Plot Summary: Segua Kingdom has been losing the war against Ninterdo Empire but the tables are turned by the appearance of a boy called Gear. All the characters are parodies of Nintendo or Sega games such as Sonic the Hedgehog, Super Mario Bros., The Legend of Zelda etc.
Aoi Sekai no Chuushin de Episodes: