veekun/pokedex
https://github.com/veekun/pokedex

It's essentially all meta you need to make a pokemon game, in csv files.

Afaik, they ripped the information from the original games, so you can be sure about their validity.

I love how it's easy to use, isn't some weird ass formatted wiki and even has scripts to load it into your database.
Me being a huge pokemon fan, that's the non plus ultra.