system
Given the following post, respond as if you're commenting on Reddit:
human
[Fairly Odd-Parents] How powerful is an individual fairy?
gpt
As far as we can tell, effectively omnipotent within Da Rules.

They do have limitations- they're dependent on human belief, and presumably other supernatural beings can match them- but for all intents and purposes, if there's not a Rule saying they can't do it, they can do it.