The 29-year-old's double in the additional period at the Britannia Stadium - which put his side 3-1 up - came three days after he had scored a brace of own-goals and missed a penalty in the 4-0 Barclays Premier League loss to Chelsea.
"I wasn't going to play Jon tonight - I had decided on Friday that I would give him a rest," Pulis said of the England-born Republic of Ireland international.
"But then after what had happened on Saturday, I decided the best thing to do was to get him out there again.
"And scoring the goals and playing the way he played, I think it's just great for him. It will wash away what happened on Saturday.
"He gives everything, Jon. He is just a very gifted individual in lots of respects, and his biggest asset is his big strong heart and the British bulldog spirit he has got."