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The Hard Boiled Heavies (ハードボイルドヘビーズ Hādo Boirudo Hebīzu) are a group of elite Egg Robos created by Dr. Eggman with the use of the Phantom Ruby. In Sonic Mania, each of them appear as a boss fight for Act 2 of a zone, besides Heavy Gunner who was one in Act 1 of Studiopolis Zone.
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