What are the rideable pokemon?

[Falkner]

Nope... too bad.

 

[FNX]

Quilava or Typhlosion are rideable.

 

[Darkfire]

Just read the title....

I can say Donphan. I know no others.
Unfortunately there isn't a wiki list on it either, so you'll probably need to wait on a little bit of staff insight.

I made the page but i don't feel like going through all of the files looking for pokemon that can learn ride (ofc anyone here can, just gothrough the data files, the last number in the "Machines" line will be 560 if it can learn it )
I will add any pokemon listed here to the list though
Here's the link:
http://pokemon3d.net/wiki/index.php?title=Pokémon_Move/Ride#Pok.C3.A9mon