Caterpie is a pokemon from the original game(s) on Gameboy. While he's not exactly strong, he will eventually turn into a powerful pokemon. I always captured Caterpie when I had the chance.
I also remember him in the Pokemon anime as well.
His Japanese name is キャタピー (Kyatapi) which is pretty much the same as Caterpie. One of the few Pokemon to keep their names during translation.