Minecraft Cobblemon Servers
Cobblemon is a modern Pokémon mod that adds over 700 species of Pokémon from Generations 1 through 9. Wild Pokémon can be caught and trained, and battles use a turn-based system similar to the original games. Cobblemon also adds a wide range of custom items, such as healing machines, Apricorn trees for crafting Poké Balls, and PCs for storing extra Pokémon.
To join a Cobblemon server you'll need to have the mod installed. More information and download links can be found on Cobblemon.com.