Pigeon
The pigeon's adaptability is nothing short of evolutionary masterwork. These birds thrive in environments ranging from Siberian winters to tropical heat, from rural farmland to the densest urban jungles. They subsist on a diet that would fell lesser creatures—discarded fast food, spilled grain, mysterious pavement substances of indeterminate origin. When predators arrive, pigeon populations simply breed faster, producing up to 8 broods annually. They have colonised every continent except Antarctica, adapted to underground railway systems, and learned to operate touch-screen devices for food rewards in laboratory settings.
Mario
Mario's adaptability manifests through his remarkable professional flexibility. Originally a carpenter, he transitioned seamlessly to plumbing, then expanded into medicine (Dr. Mario), motorsport (Mario Kart), professional golf, tennis, football, and Olympic athletics. He has explored space, traversed time, inhabited the bodies of his enemies through possession, and adopted numerous power-up forms including cat, tanuki, bee, and cloud. His willingness to engage in any activity placed before him—regardless of qualification or physical plausibility—demonstrates an adaptability that borders on the existentially flexible.
VERDICT
Mario's vocational variety impresses, but the pigeon's adaptability operates on biological timescales, shaped by millions of years of evolution and tested across every conceivable environment Earth provides. Real adaptability outweighs fictional versatility. Adaptability victory: Pigeon.