Cobblemon is the best Pokemon mod by far!

An awesome mod that integrates Pokemon into Minecraft perfectly. The models, animations and particles are all extraordinary and don't look at all out of place in the world. It runs pretty much just as well as vanilla Minecraft, and the battles are super smooth. The basic Pokemon gameplay is very well implemented, although some features are still missing (such as more connections between catching and levelling up Pokemon and the main gameplay of Minecraft). Still, it's a ton of fun and the devs plan to expand on these things in future updates. Disclaimer: I have helped work on this mod in the past, so I have some bias towards the mod)