PokeAPI

The basis of this entire project. Full Documentation Here

Has some shortcomings, such as not being able to retrieve multiple items with one request. Its open source and all the data is available in the repo. I might consider hosting my database, possibly with GraphQL.

Repo

BastionBot PokeRes Pokemon Images

Very nice and high resolution. Used by the Bastion Discord bot and the pokemon-api NPM module.

Altertnate URL: https://cdn.traction.one/pokedex/pokemon/25.png

Also has an API available

Remember to set the User-Agent, according to the Usage Notes