I've seen conflicting information for this - some say these two moves do double damage if a pokemon is in the air from Bounce, some say regular damage. Which is right?
The following moves can hit a Pokemon during Bounce's semi-invulnerable state:
Of these, the only moves that do double damage are Gust and Twister.
Bounce (Bulbapedia)
As of Gen 3, Thunder (but not Stone Edge) can do double damage against Bouncing Pokemon.