PSI

PSI is a major mechanic in the 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
Each PSI move can have up to 5 ranks, α, β, γ, Σ, and Ω (Also π in Mother).

There are also four categories of PSI: Assist, Offense, Recover, and Other. Most offensive PSI can be countered by high ranks of PSI Shield or PSI Counter.

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.