is an aquatic Badnik created by Dr. Eggman. It appears in Sonic CD in the Tidal Tempest Zone. Although it functions underwater, its name means 'dragonfly larva'. When Sonic approaches, it will drift down slightly and then suddenly charge through the water at Sonic. In the Bad Future stage, all of the Badniks have fallen into disrepair and the Yago can no longer launch itself at Sonic.

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