Sessegnon has not been seen in a Premier League match since last season, but he was handed a start against his former club, and impressed.
The Benin international was a constant menace during his time on the pitch, and Pulis has challenged the attacking midfielder to carry on putting in performances of that standard.
“I just fancied Sess because of playing against his old club and it was one that I’d had in the back of my mind for a while,” Pulis said. “He’s come in and he’s done brilliant. It’s just that consistency with him.
“If we can get that type of performance every week, he’ll be playing every week.
“I thought playing against his old club would be a spur for him.”
Sessegnon remains one of West Brom's most naturally gifted players, but he hasn't thrived under Pulis so far.
The Welsh manager demands his players work hard for the team, and Sessegnon has always preferred to play with licence to roam.
However, he appeared to slot into the Baggies' system well at the weekend, and he will be hoping to keep his place in the team for the foreseeable future.
West Brom's win over Sunderland has pushed them up into 13th place in the Premier League table, with their next game coming against Norwich City.