There are 16 teams to play as and win in order to get this.
Play ODI match from the main menu, always 6 overs, slog and realistic setting. Play always against Bermuda, field first and bowl Yorkers at the off stump. You can usually bowl them out In 2-3 overs, and win the match in 6-10 mins. So all in all this will take 2-3 hours to get in platime.
A big tip is only save if you win the match - that way you can check who you need to play/win as, in the menu under ODI caps. As you get one for playing a match, you know who you have missed.