Need help with antagonists

Recently my little brother got the ninja team combo vehicle set and I was thinking about buffing the antagonist team to play along with him. I found Thunderfang for 60$ and Crystal king for 30$. The price is not a problem, but I want to know if they are proofed for active play and overall quality.

Tl; DR: wanna more bad guys, don't know if those two are worth it.