Daniel Ballard doubled the lead with a stunning strike before French international Wilson Isdoe sealed the victory, curling a superb effort into the far corner.
Wolves announced the induction of the late striker into the club’s Hall of Fame on Thursday, July 17.
Fluminense captain Thiago Silva had extra reason to celebrate after Monday’s 2-0 win over Inter Milan in the Club World Cup round of 16.
Crystal Palace came into the final as big underdogs and started the game cautiously, letting Manchester City control the ball early on.
The achievement marks Slot’s first piece of silverware since succeeding Jürgen Klopp.
He added, “Nothing about this is easy to write, but as football players, we all know this day eventually comes.”
A stoppage-time goal for the visitors was ruled out after a lengthy VAR check.
Egyptian forward Marmoush, signed from Eintracht Frankfurt in January, scored his first two goals for City in five minutes.
Pep Guardiola’s side will look to bounce back when they face League One side Leyton Orient in the FA Cup fourth round on Saturday.
It took Mikel Arteta’s Gunners just two minutes to open the scoring courtesy of their captain, Martin Odegaard.
