For a sport like freestyle, I think it will be unlikely there is ever testing. I'm sure there is a freestyler that has used a PED of some sort, but I'm not even sure if they did it for freestyle.
I personally don't care. It's your body, so you choice.
As for learning a 90move combo in 6months. Genetics has just as much to do with it as possibly using PEDs. I think many of these supernaturally quick improvers just have ridiculously good genetics.