The Robot Hat is a vanity item which is a rare drop from Piranha or a Angler Fish. The easiest way to obtain it would be to make a wire trap with Piranha Statues. An easy way to farm them is to build a small 10x10 room and fill it with water, then place as many statues as you can fit and wire it up with 2 dart traps and a 1 Second Timer.
- The Robot Hat is a direct reference to the headgear worn by Quote, the robotic protagonist of Cave Story.
- It also bears a small resemblance to Ash Ketchum's hat from the Pokémon TV anime series.
- Added to the game.