To have the maps work, please follow these instruction

C:\Users\your user name here\Documents\My Games\Sid Meier's Civilization 5\MODS\MLP Maps (V1)

there you want to find
C:\Users\your user name here\Documents\My Games\Sid Meier's Civilization 5\MODS\MLP Maps (V1)\Maps

and
C:\Users\your user name here\Documents\My Games\Sid Meier's Civilization 5\MODS\Sinnoh Region Map Pack (Pokemon) (v 1)

In these 2 folders will be files with the ".Civ5Map" extension, copy those into:
C:\Users\your user name here\Documents\My Games\Sid Meier's Civilization 5\Maps

If you'd like to fix this modpack for Multiplayer, use this tutorial to do so, we tested it and it works with this modpack:
https://steamproxy.net/sharedfiles/filedetails/?id=361391109