PSI Thunder is a PSI spell available for use in Mother 2. It is able to disable PSI Shields, and depending on the form, hit more than once. The downside of this spell is that it isn't effective against single enemies, as it misses quite often against them.
 Mother 2
Both Paula and Poo are able to use it. Paula is able to realize the alpha, beta, and gamma forms, while Poo is able to realize only the gamma and omega forms. For each advancement in form, PSI Thunder gains one more strike. For example, PSI Thunder α gets only one lightning strike, while PSI Thunder Ω gets four.