MISSINGNO (Pokémon)

MISSINGNO is a dual-type Bird/Normal Pokémon. It is based off of the infamous Missingno. glitch from Pokémon Red and Blue.

It is known to evolve to kangaskhan in Red/Blue at level 0

Pokédex Entry
A glitch Pokemon [sic] used by some to duplicate items. However, over time, it has lost this ability.

Cinnabar Island
Cinnabar Island is reached from the port in Ladoga Town while the Cinnabar Ticket is in the player's bag. MISSINGNO is at level 50 when encountered.

Trivia

 * MISSINGNO's entire movepool (with the exception of Wormhole, which is commonly teachable to Pokémon capable of learning Psychic) is composed of moves available in the first generation of Pokémon games.