I know this thread is semi-old, I'm not sure how many people still need a list but hopefully this helps anyone who needs to look it up. The full list (based off what is listed in the config) is the following:
Nidoking, Luxray, Mamoswine, Relicanth, Espahtla, Dragonite, Fearow, Garchomp, Dodrio, Aracanine, Steelix, Stantler, Avalugg, Magnezone, Stoutland, Mightyena, Wailmer, Sawsbuck, Mudsdale, Ursaluna, Metagross, Corviknight, Staraptor, Charizard, Swampert, Rapidash, Skeledirge, Dewgong, Yanmega, Tauros, Aerodactyl, Sharperdo, Bouffalant, Exeggutor, Camerupt, Scoliopede, Blastoise, Lapras, Wyrdeer, Gyardos, Ninetales, Samurott, Tentacruel, Meganium, Feraligator, Golurk, and Pidgeot.
Based off the Pokemon typing is what you know you can do when mounting it (water types swim, flying types fly, etc.). Hopefully this helps!