Omniscience

Summary
Omniscience is capacity to know everything there is to know including things that can happen, have happened and did happen. Omniscience beings in fiction generally already know what a character is going to before they make an act. Omniscience aren't completely invincible as they are still capable of being overpowered and being defeated. Also just knowing everything in a specific fiction is considered Omniscience and it doesn't have to include knowledge of outside series too

The term of entities who know almost everything there is within existence is Nigh-Omniscience

Users

 * The One Above All (Marvel Comics)
 * Kami Tenchi (Tenchi Muyo)
 * Godhead Pickle Inspector (Ms Paint Adventures)
 * Akasha/Void Shiki (Nasuverse)
 * Sarda The Sage (8-Bit Theater)
 * Eru IIuvatar (Lord of The Rings)
 * The Author (AT-2verse)