Piranha Statue

The Piranha Statue (misspelled as Pirahna Statue in-game) spawns up to three Piranhas when activated. Any killed Piranhas will not drop coins, but may still drop a Hook or Robot Hat.

The statue can be useful for farming Piranhas for the rare Robot Hat drop. While Hooks can also be obtained this way, it is unlikely that one would not have a Grappling Hook by the time they had access to wires and power triggers (after rescuing the Mechanic in the Dungeon).