Due to this, it was impossible to complete a Generation I game using only Caterpie or Metapod, since Struggle couldn't hit Ghost types at the time.
In the anime and in Pokémon Adventures, Caterpie holds the record as the Pokémon who takes the least time to evolve twice, taking only one episode in the anime and one chapter in Pokémon Adventures.
Poliwag and Togepi also share this record, but in Pokémon Adventures only.
Prior to Generation VI, Caterpie's body style was .
In Ash Catches a Pokémon, when Caterpie evolves into Metapod, the process was similar to a real caterpillar going into pupation. Laterepisodes show Caterpie evolving like the rest of the Pokémon do.
Caterpie is tied with Weedle for having the lowest Special Defense stat of all Bug-type Pokémon and is tied with five other Pokémon for having the lowest Special Defense stat of all Pokémon.
