Poké Gods were popular concepts after the release of Red and Blue in the United States. They were all fake, though.
They were thought to be nearly-invincible, well-hidden bonus Pokémon. So it seems no one was quite satisfied with MissingNo..
“Anthrax is a Poké God from Red/Blue/Green. It had no specific appearance, although it was...Anthrax
“Mew (Japanese: ミュウ Mew) is a Psychic-type mythical Pokémon. In Red/Blue/Green, it could be found...Mew
“Ranier is a Poké God from Red/Blue/Green. It was thought to be similar to Blastoise, but like...Ranier