Pokemon red. The missing no glitch.HA HA catching a pokemon if your lucky you can catch missing no. Missing no is a glitch compared to any other glitch this is one of the most popular glitch. Missing no boosts up your 6th item in your pocket even if you don't catch him or defeat him. Now after either catching, or defeating or even running away you see the old man in pokemon red in cinnabar island you see the old man on top of a building and then  you go inside the building you come back out, then the old man isn't there and some rumors say that if you catch missing no is he looks like a trainer as his picture and if you go back to the old man who you start to do the missing no glitch missing no is unpixelated for the eyes to see and he looks like a dead pokemon its kind of like a marowak but more dead looking but sometimes that doesnt work it has a different pokemon.

I like missingno because he gives me free rare candies and master balls. I always use him to cheat at Pokémon Red. Know why? Cuz I'm a cheater. Also @tsarfatirox I heard if you have letters x,y, or z in parts of your players name you can encounter Pokémon skeletons that are in Pewter city or the Lavender Town ghost. Also there is a form of Missingno called *glitch letters* 'M *glitch letters* That if you catch it a ditto appears but the ditto is invisible. And if you encounter Missingno and the battle ends Pokémon's sprites are glitched up but if you look at a Pokedex entry of a Pokémon or reset the game the sprites return to normal. There is a lot of rumors revolving around Missingno too. Some people (Even Nintendo!) thought Missingno could delete your save file, but that's not true.