The 19-year-old was brought on as a substitute after an hour and promptly transformed the third-round replay, leveling the scores with 11 minutes remaining after former Reds midfielder Luke Chadwick had put the League One side ahead at Stadium MK.
Powell then added his second one minute into extra-time with a sublime dink over David Martin after bursting through the Dons defence, a lovely goal that was quickly followed by a killer blow from Latics forward Marc-Antoine Fortune.
Notably, Powell has now scored 10 goals since joining Wigan on a season-long loan in the summer, adding to his burgeoning reputation. Speaking after Tuesday’s cup win, Latics boss Uwe Rosler was full of praise for the former Crewe Alexandra starlet.
“It was always the plan to bring Nick on if he was needed and he was needed,” Rosler told reporters. “He is 19, getting first-team football in the Championship and fighting for the play-offs.
"He is playing here, where the pressure is on. I have to be very careful that we do not burn him out. I think it is good for us and Manchester United. Hopefully, after the season is finished, they will get a player back with more experience of top Championship level.