Picrites are used for two specific things in the game. These will speed up your gameplay and stop you having to wait for time to pass
The first feature is the ability to recover your Pokémon. After they have been used for a skill, then they will have to wait a period of time before they can be used again. Using Picrites, you can forgoe this period and heal your Pokémon instantly. Do note that Legendary and Mythical Pokémon cannot be recovered using Picrites. You also have to spend 300 Picrites to get to the Alt World and 500 Picrites to get the Mega Pencil to complete Mega Evolved Pokémon stages.
Picrites can also be used to recover your Energy metre. Whenever you make a move in a puzzle, your metre will go down and you'll have to wait for it to replenish. If you spend 10 Picrites, you can have it recover instantly. You can also use Picrites to upgrade the metre to get more energy on it. There are 5 different levels.
||New Energy Amount
||Infinite - Energy no longer depletes
Picrites can also be used to open access to the next area. Every area requires spending Picrites to unlock.