India thrashed Pakistan by six goals to nil in the Sultan of Johor Cup Hockey Under-21 Tournament being played in Malaysia on Wednesday. India's Arman Qureshi scored two goals, while Imran, Parminder, Harmanpreet and Varun scored one goal each. India has so far earned six points from three games, while Pakistan is languishing with one point from three games. India will clash with Malaysia, while Pakistan meets New Zealand on Thursday.