Generation II.

Falkner is the first gym leader you encounter on your Pokémon journey in Gold/Silver/Crystal. He is a master of the flying-type, and has an underleveled Pidgeotto to prove it. Here is his setup:
Pidgey
Normal/Flying
Lv. 7
♂
Tackle
Mud-Slap
Pidgeotto
Normal/Flying
Lv. 9
♂
Gust
Tackle
Mud-Slap