omg im a true 90's kid but jezz theyve come out with so many since then its hard to keep up lol, but id have to say maybe hounddoom off the top of my head...i stopped playing around the silver n gold version lol!
onyx for me.... too many pokemons (pl ?) out now, catch them all! oh you have... here's one that looks like a stick but is made of rock, flies and shoots fire from it's ....errr..... hole