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