It is not a selectable Pokémon in Ruby. If in doubt as to which characters are "4th generation" you can consult the Pokédex website. Gible didn't exist in the original Ruby game. In Pokemon Omega Ruby, however, you can catch a Gible (as a Hidden Pokemon) on Route 111.
Route 111 (Desert)
The description on the Pokemon will either say it came from cinnibar island or route 111 or it will say met in a distant land or met in a trade whichever it says. The region for firered and leafgreen is kanto and ruby/sapphire and emerald is hoenn.
in route 111 in the dessert
Route 111 (desert).
vfrt in the pokedex for sinnoh #111 in the pokedex is a garchomp
Number 111 on the sinnoh poke-dex is garchomp which can be seen in Cinthia's party in Pokemon league. In the national dex it is rhyhorn which is in victory road and stark mountain.
Gachomp is #111 in the Sinnoh Pokedex.
It is not a selectable Pokémon in Ruby. If in doubt as to which characters are "4th generation" you can consult the Pokédex website. Gible didn't exist in the original Ruby game. In Pokemon Omega Ruby, however, you can catch a Gible (as a Hidden Pokemon) on Route 111.
Rhyhorn
Rhyhorn is #111 in the national pokedex, and it is a Ground-Rock type Pokemon.
The 111th Pokemon on Platinum is Garchomp.
If you are talking about Pokemon 113 (Chansey), then it is on route 210 and route 209 (Both By Solaceon Town). It's a very difficult one to catch!
111 is an odd number.
Garchomp go in the Pokemon league the last trainer of it.
Route 111 (Desert)
The description on the Pokemon will either say it came from cinnibar island or route 111 or it will say met in a distant land or met in a trade whichever it says. The region for firered and leafgreen is kanto and ruby/sapphire and emerald is hoenn.