Teach Venusaur 'Fly'? >Yes In order to learn HM04 Fly, one move must be forgotten. Which would you like to replace with? >Solarbeam One..two..three... And it learned fly!
This DOES Happens if you play tohoumon by playing the original unpatched file with your saves I think Bulbasaur is Reimu in the game so i Guess she can learn it ( i dont know i always pick sakuya or marisa as my first tohoumon) because she has several flying moves