Defending champions West Indies pummelled a listless Pakistan by 84 runs to set up the ICC World Twenty20 clash against Sri Lanka, here today. Dwayne Bravo (46) and skipper Darren Sammy (42 not out) pulverised a decent looking bowling in the final three overs as West Indies put up an impressive 166 for six and then shot out the opposition for a meagre 85 in 17.5 overs.