(Other) So I was playing a wifi (cartridge) battle the other day... - Smogon Community
Reading the thread linked above made [MENTION=35320]Pidge[/MENTION] and I actually do something and check it out in game to see whether Taunt and Encore really worked that way and we found out that they did!
The turn when taunt and encore are used still counts towards the three turns it is supposed to last if the Pokemon that used taunt and encore is
faster than its opponent.
Test from in game:
Mienshao used Taunt
Drifblim uses Spit Up (Fails)
Mienshao used Bounce (goes up)
Drifblim uses Spit Up (Fails)
Mienshao used Bounce (hits)
Drifblim uses Spit Up (Fails)
Taunt ends
If the Pokemon that used Taunt and Encore is
slower than its opponent, then the turn one of those moves is used does not count towards the three turns.
Test from in game:
Swellow used wing attack
Minun used encore
Swellow used Wing attack
Minun used Nasty plot
Swellow used Wing attack
Minun used Nasty plot
Swellow used Wing attack
Minun used Nasty plot
Encore ended
As you can see this is a very important change to battles so you better remember it!
(I will because I lost my BW Tourney match because of this

)