The Pet Leprechaun is a leash that was added during St. Patrick's Week 2014. It can only be obtained by consuming ten Blarney Pebbles, which can be obtained by completing any of the nine BLARNEY worlds.
This item summons a leprechaun to follow the wearer and gives them the Rainbows mod, which substitutes the player's punches with rainbows fired from the leprechaun. The rainbows deal more damage to blocks than the unequipped fist. The player's character will hold a four-leaf clover when equipping the Pet Leprechaun.
- Upon usage of ten Blarney Pebbles, a message will appear: "Zing! A leprechaun appears!" and the Pet Leprechaun will be instantly equipped.
- The inventory image used to be a four-leaf clover, but it was patched on April 10th to show the Leprechaun instead.