Originally Posted by Fat Onicon
Well, とぶ does mean something like flying, but also hop, jump, leap. That at least explains why Dodrio can learn it (jumps high!?) and Gilgar cannot. It glides, thus cannot gain altitude.
And I also realized that bugs cannot learn Fly, regardless of their sub-type.
Volcarona and Genesect can learn it. I understand the former but not the latter.