Minecraft Pokemon servers brought Pokemons to Minecraft, meaning you will be able to find, catch and level up Pokemons on those servers.
Pokemon servers usually require special modpack installed in client but that's not really an issue since those Pokemon modpacks are free, usually available on server's website.
Pokemons in Minecraft!
Pokemon servers are great alternative to the actual Pokemon games and is something that can be enjoyed with your friends in a multiplayer environment on Minecraft servers.