The Revenge of the Battle-Cars Add-on for Rocket League has 5 trophies - 2 bronze, 2 silver and 1 gold.
Equip a Topper and win an Unfair Bot Match
Win a game against All-Star Bots with a Decal equipped
Win an Online Match with Backfire, Scarab, or Zippy
Use the Standard or Accelerato Boost with Octane or Backfire while playing in Urban Central
Win the MVP award using Backfire, Scarab, or Zippy