Board Thread:Questions and Answers/@comment-27327020-20160404174206/@comment-32788676-20170503130022

Gaster is a bit of a touchy scale to use.

While we can confirm 2 things, Gaster is omnipresent and possibly nigh omniscient.

However his power?

The thing is, when you try and name Chara GASTER, the game closes back. This means someone like Chara cannot mandate having the name Gaster. This type of power could put him in the top 3 most powerful undertale characters and possibly put him over Flowey, however there's too much mystery behind him to actually scale it.