Pokemon Red, Blue and Yellow 3DS glitch guide: How to catch Mew and tame Missingno. ... The MissingNo Pokémon is most often found after you perform the Fight Safari Zone Pokémon trick.

VGMoose says the Missingno hack was inspired by the announcement that Red, Blue, and Yellow were coming to the 3DS eShop earlier this year. “People were speculating that Missingno might become ...

According to players, transferring MissingNo. from Pokemon Red, Blue, or Yellow into Bank via the Transporter app messes with nicknames, permanently rebranding your catches.

Interestingly the Yellow 2DS came with stickers of the starters and evolutions, Eevee, Pikachu, Jigglypuff, Psyduck and Abra and Slowpoke. The latter two feature in the glitch.

That was years ago, though, and MissingNo. has been a non-factor in subsequent Pokémon games… until its return in Pokémon Sun and Moon, thanks to the 3DS Virtual Console release of Red, Blue ...

Future Pokemon games have had glitches and even glitched 'Pokemon,' but Missingno hasn't really made a return in any official capacity—I mean, it's not a real Pokemon and all that.

So while players have known for awhile that Missingno are basically incomplete Pokemon data, the origin of that data, how far along it was in development, and what it would have been were a mystery.