The 32-year-old has been a key part of the Potters' rise from fighting relegation in the Championship to becoming an established Premier League side.
Stoke's fans plan to mark his farewell with a minute's applause after 10 minutes in recognition of his No.10 squad number.
Pulis said: "Ric has been a fantastic signing for the club.
"We took him for £200,000 and people then said he was a risk. But you look at the games he's played and the part he's played at the football club. He's been phenomenal and a fantastic player.
"He is different, in every way. He's just a different lad and a different culture but a great lad. He's got all sides to him and everything in his make-up as a human being.
"You can like him, dislike him, love to hate him or to appreciate him.
"What you can never dispute is the role he has played for this club."