What hits first Quick attack or Extreme speed?

Question

Becuase Extreme speed says it hits before any move does it count other priority like sucker punch, Fake out, and Ice shard. And would it hit before a faster priority user like if Lucario used Extreme speed and Swellow used Quick attack who would hit first.

Comments

For what Generation? IV or V?

Answer 1

Yes, Extreme-Speed will go before any move that has a lower Speed Priority like Ice Shard. But it will not go before any move because there are moves with a higher Speed Priority. Here are moves that will go before Extreme-Speed:

Helping-Hand
Endure
Fake Out
Magic Coat
Detect
Snatch

There is a lot more so I also gave a list here:
http://serebii.net/games/speedpriority.shtml

Extreme-Speed will go before Quick Attack if both used in Battle..