For a certain something, players who have positioned Rocket League Items inside any serious mode will get a vivified decal that can be prepared on any adaptable vehicle, as per Psyonix.
In the event that you haven't positioned or arrived at the level you want, serious season 12 is required to end around Dec. 5, so you have some time.
Before 2019 finishes Psyonix will be delivering every one of the three unique DLC packs, Supersonic Fury, Revenge of the Battle-Cars, and Chaos Run for Buy Rocket League Items nothing. Players can presently don't buy these packs as of Oct. 23.
