This is the Official server for pokecube, it uses the modpack found here:

https://minecraft.curseforge.com/projects/pokecube-pack


Alternately, if you do not wish to use the modpack, the following two mods are all that are needed to join:
https://minecraft.curseforge.com/projects/pokecube-aoi
https://minecraft.curseforge.com/projects/thuts-elevators

If you use the mods, make sure that you do not also get thutcore, as that is inside the pokecube jar.

If the curseforge aio isn't updated, you can manually download it here as well:
https://github.com/Thutmose/Pokecube/releases