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The Jellosious Caverns Is A Big Cave That Is Mainly A Mix-Up. The Main Boss Here Is Jellomahmaster. It Also Is The Only Area Where Natural Blobby A's Spawn, Artificial Blobby A's Come From Fighting Andanderus In The Genocide Route, Fighting Corruption (Who Can Spawn Any Normal Mob In The Game), And From Jellomahmaster's Attack, "Trusty Servants".