Upload NFT metadata to IPFS using NFT Storage.
When you have hundreds of NFTs to upload, creating each NFT manually through the OpenSea UI is not practical.
You need a script to create the NFTs in bulk.
Github link for the code in this video:
OpenSea NFT metadata standards:
pkmn.net for the Pokemon sprites =)
https://gist.github.com/santiagoolivar2017/0591a53c4dd34ecd8488660c7372b0e3 for the CSV file