–Wagstaff, when examining a Piko
–Wagstaff, when examining an Orange Piko
Both Piko and Orange Piko spawn from Tea Trees, and seem more likely to spawn near clumps of several trees growing close together. They do not seem to spawn from tea trees planted by the player, unless one is caught in a trap and put on the ground near that tree. After a few seconds, the Piko will run up the nearest tree, "infecting" it with Piko.
If an item is dropped on the ground (either edible or not) near a Piko or Orange Piko, there is a chance that it will stock it in its cheeks and flee with it. It is common when you chop a Tea Tree that Pikos may spawn or race in from nearby trees and steal one of your Logs, Twigs, or Seed Pods.
During a Full Moon or Blood Moon, Piko will glow, their eyes turn red and they become aggressive. In addition, an attack from a Piko or Orange Piko will, like frogs, cause the item in the leftmost slot of the inventory bar to drop from the player's inventory. After said item is on the ground, the Piko/Orange Piko prioritizes storing the item in its cheeks and retreating to its home Tea Tree.
- Be very careful when you chop Tea Trees at night with a Lantern on the ground. Pikos might steal it, and if you haven't got any other light source, you will be in total darkness and may die from Charlie.
- As Pikos do not spawn from trees planted by the player, getting rid of all naturally occurring Tea Trees in an area will prevent new Pikos from spawning there.
- Using an item to bait a Piko is an easy way to kill them, as they prioritize retrieving the item and running away with it rather than running from players when approached. Players can get free hits on Pikos as they run toward the item. If the Piko picked up the item, the player can retrieve it by killing the Piko, as they run toward a given Tea Tree in a predictable straight line.
- Pikos cannot pick up backpacks, but will relentlessly try to anyways, making for very effective bait.
- Piko can hide in Tree stumps as if the tree was still present and will thus run up an invisible tree and disappear.
- The use of Orange Pikos in making Tea and Iced Tea may be a reference to orange pekoe tea.
- The Piko may be loosely based off of the real-life pika, who are known to steal food from its own kind, and pica, an eating disorder characterized by the consumption of inedible items.