The RCB coach came out on top and "embarassed" Harshal during the game.
"First game was pretty close and then I lost 4-11 in the second game", said Harshal in a video posted on RCB's YouTube page.
"I have embarassed myself enough today", he quipped.
Bangar's fairytale run came to an end in the semi-finals when he lost to Kohli.
The former RCB skipper entered the finale as the favourite but succumbed to a defeat against Ashish, the team's Bubble Integrity Manager.
Kohli will be aiming to bounce back to form in RCB's upcoming fixture vs PBKS on Friday, at the Brabourne Stadium in Mumbai. The 33-year-old has been in poor batting form this year and was dismissed for his third golden duck this season as RCB defeated SunRisers Hyderabad (SRH).
He was sent packing on the first ball of the match itself, when he received a full delivery by Jagadeesha Suchith, on the pads. Kohli could only direct it to short midwicket where Kane Williamson took a simple catch.
It was also his sixth golden duck in IPL history.
During the ongoing season, Kohli has registered 216 runs in 12 matches, including a half-century.