For the Saints, Jason Crowe dished out eight assists in the first half alone, as the league's premier dime delivery man also added two rebounds, five points and a steal in the opening 20 minutes.
In the second spell, Crowe continued to etch marks in to his statistic line and he finished the game with 11 assists and 10 points.
Fellow Saints import Ernest Scott was busy on the offensive end of the court as he racked up a game-high 28 points and did his best to keep the Wellingtonians in the game who led the contest by two points at half-time.
Pledger, one of the tallest players in the game at 2.13m, found himself in foul trouble during the first half as he had three calls go against his name.
He took a seat on the bench during the latter stages of the second quarter but began the third well as he continued to carry on his rebounding and point-scoring ways as he finished with nine boards and 20 points.
The two-time Australian NBL champion with the New Zealand Breakers was a challenge to stop for the Saints who struggled with Pledger's size and he was named the Final Four's most valuable player.
Former Tall Black Jeremy Kench, who only played on and off for the Saints during the season due to his Police college commitments was useful off the bench as he collected four rebounds, three assists and eight points, although he fouled out late in the fourth quarter.
The Auckland Pirates, in their second year of existence, finished the regular season with the league's second-best record and managed to topple the Manawatu Jets in their semifinal 104-88 on Saturday night on the back of a dominant shooting display.
The Saints' path to the final was slightly more tricky after they had to overcome the Bay Hawks, who finished 13-3 during the year and Pero Cameron's Wellington side needed overtime to beat the Hawks 94-88 following 36 points from Crowe.
In the end, the Pirates just had too much quality across the court as their stars continued to make key shots at all the right moments and of course, Boucher was there to lend a hand.
Auckland Pirates 89 (Alex Pledger 20, Ron Dorsey 18, Ismail Muhammad 16) Wellington Saints 83 (Ernest Scott 28, Casey Frank 19) 1Q: 28-21 HT: 46-48 3Q: 71-64