PSI

PSI (Psionics) or PK (Psychokinesis) are the psychic powers that appear throughout series.

Origin and discovery
PSI was originally used by Giygas's race. When George and Maria were abducted by these aliens in 1909, George studied the powers and eventually learned to use them and eventually passed them down to Ninten, his great-grandson. Much later, it was shown that in the year 199X, Ness, Paula, and Poo could each use different types of PSI.

Types of PSI
PSI moves become stronger as the user levels up, its power level being designated by the Greek letters α (alpha), β (beta), γ (gamma), and Ω (omega), as well as Σ (sigma) and π (pi) in some cases. They moves are also separated into four different categories:
 * Assist PSI: for PSI moves that alter parameters of allies or foes, inflict status effects, or shields.
 * Offense PSI: for PSI moves that inflict damage. All PSI moves in this category are called PK, except on Earthbound.
 * Recover PSI: for PSI moves that replenish HP, PP, or remove status effects.
 * Other PSI: for PSI moves designed to be used on the overworld map, such as Teleport. This category does not exist on Mother 3.

Qualities of PSI
PSI costs PP to use, which can be recovered by eating certain foods or resting at a hotel. When a character can't concentrate or is forgetful, they can't use PSI. In Mother 3, when a character is learning a new PSI technique, they will become feverish, slowing them to a walk.

Memo
"PSI is a mysterious and useful power that can replenish your energy or even assist in your transportation needs. Using PSI will deplete your PP."