Select 3-Way, Royal Rumble, or Tag-Team mode. 
Set the game so your teammate (in Tag-Team) or opponent 
(in 3-Way or Royal Rumble) is controlled by the CPU. 
Once the match begins, get in a weak or strong grapple, 
then press L to get in a rear grapple. From here press 
C-Up to get your opponent on your shoulders. No matter 
what the CPU is doing (except if stunned, down, or in a 
grapple), he will stop it, run to the nearest turnbuckle, 
jump on it, and lay the Smackdown on the wrestler on your 
shoulder.