Glitch Trainers are a glitchTrainer class that can be battled while using the Missingno. glitch. They can also be found by doing the Mew glitch with special stats ranging from 201-255 in the Red/Blue versions and 201-253 in the Yellow version. Depending on the player's name, during the Missingno. glitch a player can run into Black Belts, Gentlemen, Blue, and Professor Oak, among others.
When battling a glitch Trainer, the music begins as normal wild Pokémon music. When a glitch Pokémon is used by the Trainer, its cry may be audio from other parts of the game, such as the background music of the final battle with the rival.
Unlike other Trainers, the Glitch Trainer says nothing before or after the battle. Glitch Trainers have been known to use glitch Pokémon such as Glitchy Nidorino, Missingno., and Charizard 'M, and non-obtainable glitch Pokémon among others. Many of the Pokémon they use cannot be caught by the player using any known in-game trick and can only be caught using a cheating device.
In the Generation I games there is unused Trainer data for Prof. Oak. This implies that Oak was originally going to be able to be battled. In the data, Oak has Level 66 Tauros, Level 67 Exeggutor, Level 68 Arcanine, Level 70 Gyarados and one of the Kanto starters at Level 69. This places his strength on-par with the player's rival and the Pokémon League champion. As well, four of his Pokémon are identical to the ones used by the champion, only higher level, so originally Oak may have been intended to be in the game as the champion, or at least another high-ranking Trainer. This is supported by an email on the PC in Oak's lab, from the Pokémon League issuing a challenge to all Trainers, then specifically requesting Oak to come visit them. The only known way to battle Oak is to use a special stat of 226 with the Mew glitch, or cheat.
Chief is an unused betaTrainer class that is found in Generation I. The only way to fight a "Chief" is through using a cheating device or the Old man glitch when the player's name contains a dash in the third, fifth, or seventh letter slot. Chief's sprite is identical to that of a Scientist. The only time the word is said in the game is in Celadon City, by a Team Rocket Grunt, perhaps indicating that "Chief" might have appeared in other places and been able to battle the player. Unlike Pokémon Professor, however, there is no team programmed for Chief.
Jacred is a GlitchTrainer class that is found in Generation I. The only way to fight Jacred is by performing the Mew Trick with a Special stat of 200. Jacred has no defined sprite, hence appears glitchy when encountered.
This glitch Pokémon article is part of Project GlitchDex, a Bulbapedia project that aims to write comprehensive articles on glitches in the Pokémon games.
