At the point when you complete a Llama Rama challenge from xingwang's blog

Rocket League Reward: Battle Bus Rocket League Trading vehicle, Battle Balloon Antenna, Battle Bus Wheels, and Battle Bus Engine Audio 

Fortnite Reward: Octane Rocket League Backbling and style variety .

At the point when you complete a Llama-Rama challenge, you ought to just rush toward the Rocket League Event Challenge Page to recuperate Rocket League rewards. Besides, if you sign into Fortnite, you will therefore get any prizes you procured through Rocket League without Rocket League Item Prices hoping to promise them.