You can find a Gible somewhere along Route 206 which is below Eterna City and above Oreburgh City. I hope this helps in you're still looking for a Gible.
you can get diagla on dimond
in a cave under the bridge by wayward cave on pearl
Wayward Cave on route 216
you cant he is only in pearl, diamond
evolve gible go under cyling road to find him
A rare Pokemon to get in Wayward Cave and totally worth while in my opinion is Gible. Gible is the 'baby' version of Garchomp.
you run along the walls until you find gible, or if its not the secret entrance, you go deep into the cave and find gible
Wayward Cave
The Cave near Eterna City Cycling Road
it will be the female Pokemon
Watch this video copy,paste an search this link The Secret Cave And Where To Get Gible On Pokemon PearlDiamond!!!
there is a secret entrance near wayward cave, enter it and you should be able to find gible after some time. You need to evolve gible to get gabite