Dr Kahls Robot, The Cuphead Show! by MissShirotoKuro on DeviantArt
Dr. Kahl's Robot - Cuphead - Cuphead NFT | OpenSea
After beating the game, I have to say Dr. Kahl's Robot is by far the most difficult boss battle. My #2 would be Grim Matchstick and #3 the Devil himself. Unheard of
Dr. Kahl's Robot Boss by 1WaterInABottle1 on DeviantArt