at rt. 204 but caterpie is rare so it will take a week or a while
After the game, use the Poke Radar north of Jubilife City.
You have to transfer caterpie from a GBA game with pal park.
Using the FireRed Dongle method, in Diamond and Pearl you will find Caterpie, Metapod, Ekans, Arbok, Growlithe, Elekid and Gengar and in Platinum you'll find Caterpie, Metapod, Ekans, Arbok, Growlithe and Gengar.
With a FireRed game in the GBA slot (if your DS is an original or Lite design), you can find Caterpie in the Eterna Forest.
If you mean Caterpie,Route 204 Jublife city side after getting your national dex put Pokemon Fire red in the GBA slot for your DS .
trade a butterfree from white two, (you can find them inside the pinwheel forest hidden grotto) then breed to get yourself a caterpie.
route 501
Caterpie cannot learn cut
Upstairs in any Pokemon Center. You have to trade with a Kanto game.
find a caterpie in eterna forest then level it to level 7 and it will evolve into larvitar
in the grass maps.if you find the caterpie catch it and evlove it to its final stage butterfree
Caterpie evolves into Metapod