I don't want to sound harsh, but... talkback threads for most of modern CN's originals shows have little to no posts (save for few like Craig of the Creek). Like a discussion for an episode from Owl House has more posts than every reply to Victor & Valentino episode on this forum combined.
Both "Phineas And Ferb: Star Wars" and "Scooby Doo And Batman: The Brave And The Bold" tie with 2 votes each. I'll be tiebreaker. It was really hard, but I pick "Phineas And Ferb: Star Wars". Now the final matchup is between "Phineas And Ferb: Star Wars" and "Quack Pack".