Polkadot meets Pokemon Rip-off and you get the PolkaPets. Basically most of the Pokemon designs are copied and converted in such way that they are attractive and people would go for. It's one NFT based collection of Pets you can get on Polkadot blockchain. I wonder where is original Pokemon? I am sure they can make millions with official art and the NFT :) You can check out the official Polkadot Pet world here: https://www.polkapet.world (Image credit: PolkaPet)