Through a well known oversight, the glitch Missingno. can be encountered through normal gameplay in the Generation 1 Pokémon games without cheating devices or tampering, changing the face of the franchise forever.
In the spotlight today are some localization mistakes, small oversights and a few neat mechanics.
You may know them as Pokémon Red and Blue. The first Pokémon games joins the Hall of Fame along with the like of Donkey Kong, Halo: Combat Evolved and Street Fighter II.