Here is a list of what Pokmon can be found where. Currently we only have a list to Touka Forest but it will be updated as I delve into the game with Sprites as I have them:
Route 101
Jiguzaguma, Pochena and Kemusso


Route 102
Jiguzaguma, Pochena, Rarutosu, Ametama, Taneboo (Ruby Only), Hasuboo (Sapphire Only) and Kemusso


Route 103
Jiguzaguma, Pochena and Kyamome


Route 104
Jiguzaguma, Subame, Kemusso and Kyamome


Touka Forest
Jiguzaguma, Kinokoko, Subame, Kemusso, Karasarisu, Mayurudo and Namakero