Open Rocket League
Go to the Garage
Select Decals
Check the available decals for your car
Look for Mirror Bot in your inventory
If you do not own it, check the Item Shop
Check Rocket Pass rewards if it was part of a season
Trade with another player if trading is available on your platform and region
Watch for special event rewards or limited-time drops
Verify the item name and platform availability, since some items are region- or platform-specific