Leprechauns are quick, and will jump around unpredictably similar to Vampires. If they walk over any type of Treasure, they collect it.
If they manage to make contact with the player, They will jump on the player for a second before stunning them like a monkey would.
After doing this, the player will be stunned for roughly 3 full seconds and will drop several gold chunks, which are taken from the player's inventory. The Leprechaun may collect these chunks of gold while the player is stunned, and if they manage to collect enough gold, they will teleport away to a far away, random section of the level.
Upon being killed, they will drop a Four-leaf Clover, as well as any treasure that they may have picked up, either from the player or the level itself.
If a Leprechaun spawned on a level, it also guarantees the spawn of a Pot of Gold, which may be found with the help of the Four-leaf Clover that he drops.
Unusually, Leprechauns are worth 0 favor points when sacrificed at an Altar, meaning they cannot be used to earn a reward from Kali. Despite this, Altars are still a reliable finisher after stunning a Leprechaun, as they will still drop a Four-leaf Clover after being sacrificed.