1. Most Wickets
The record of Most wickets in world t20I is hold by Pakistan all rounder Shahid Afridi. He was brilliant with the spin in the t20I world cups.From his 34 matches he took 39 wickets at an economy of 6.71. He got the 4 wickets hall twice. His best performance in the tournament was 4/11. He bowled 135 overs with one maiden over in the basket.
2. Most Wickets in a tournament
Sri Lankan spinner Ajanta Mendis was in his best in the 2012 world cup held at Sri Lanka. He had a crucial role in guiding the hosts to the finals. Out of six matches he took 15 wickets with best being 6/8. He took a five wicket performance and a four wicket performance. He had a economy of 6.12 in the year. He made 3 maiden over performance in the tournament.
3. Best Average
West Indies spinner Samuel Badree have the best Average in the World t20I's. His average was 13.58 from 15 matches. From his 59 overs he conceded 326 runs and took 24 wickets. He is having an economy of 5.52 in the scenario. Mendis is in the 2nd place with an average of 13.58.
4. Best Strike Rate
Mendis is having the best strike rate in the grand stage of t20I. 13.4 is the strike rate of him in the tournament. Out of 21 matches, he took 35 wickets. His economy was 6.70 in the tournament. He bowled 78.3 overs and conceded 526 runs. Pakistan's Umar Gull is in the second place with a strike rate of 14.1.
5. Best Bowling Performance
Mendis took 6 wickets in the 2012 world cup against Zimbabwe. He just conceded 8 runs in the match. He had an economy of 2.00 in the match. He was brilliant in the whole season taking 15 overall wickets. His teammate, Herath is in the second place with a bowling figure of 5/3 against New Zealand.
6. Best Economy
West Indies spinner Sunil Narine had an economy of 5.17 in the World t20I's which is the least for any bowler. He just conceded 231 runs from 268 balls. He took 15 wickets in the whole season with a best performance of 3/9. His strike rate was 17.8 in the tournament.
7. Most Four Wicket Haul's
Pakistan spinner Saeed Ajmal took three 4 wicket performance in world t20I for Pakistan. He took 36 wickets in the World cups in the span of 2009-14. His best performance was 4/19. His economy was 6.79 with a strike rate of 14.8.
8. Best Economy Rate in an Innings
Kulasekara hasn't conceded a single run in the 2014 world t20 match against Netherlands. In his 2 overs he took 2 wickets for 0 runs. This is the most economical overs in the scenario. His team mate Rangana Herath is in the 2nd place with an economy of 0.85 against New Zealand. He conceded just 3 runs from his 21 balls and took 5 wickets for Sri Lanka.
9. Best Strike Rate in an Innings
Netherland's PA van Meekeren is having the best strike rate against a team in the t20 World cup. He had a strike rate of 3.0 against Ireland in the 2016 world cup. He just conceded 11 runs in his 2 overs and took 4 wickets. England's D Wally, Joe Root, Australia's Michael Hussey and Pollard are in the list with the same strike rate. But considering the number of wickets Meekeren stands top in the list.
10. Most Runs Conceded in an Innings
Sanath Jayasurya conceded 64 runs in a match against Pakistan in the 2007 world cup. This is the highest by a bowler. Pakistan batters smashed 5 sixes and 3 fours against him. His 64 runs helped Pakistan to reach a defendable score of 189 for Pakistan. The match was favored against Sri Lanka and faced a 33 run victory. Bangladesh pacer Muzrafe Mortaza is in the second place with 63 runs.