Torkoal is missing the following moves, although they're not all important, Stealth Rock and Earth Power are listed on a set and not in the 'moves' section.
Iron Tail - Gen 4 TM
Secret Power - Gen 4 TM
Earth Power - Gen 4 tutor
Captivate - Gen 4 TM
Stealth Rock - Gen 4 TM / Dream World(?)
Natural Gift - Gen 4 TM
Snore - Gen 4 tutor
Mud Slap - Gen 4 tutor
Rollout - Gen 4 tutor
Headbutt - Gen 4 tutor
By the looks of things, most BW Pokemon are missing moves they can get via Gen 4 and be transferred.