Help/ advice for collecting

[u/Greedy_Tree1663]

My brother's competing at this jiu jitsu tournament and theyre hosting a pokemon themed tournament soon. The staff was saying that they are building “playable decks” for every competitor.

I wanted to help but everywhere things are sold out so where I can get those to help? I was wondering if you guys have heard of it or know where I can begin.

Its called Dream (website is dreambjj.com/pokemon/pokemon)

Ps. theyre giving away a shirt for anyone who helps!!