Board Thread:LotR Mod Technical Support/@comment-62.241.127.225-20161128223711/@comment-27219153-20161203005755

SamwiseFilmore wrote: MoCreatures mobs don't spawn in ME, which is something we've known for a while (see Help/Compatibility with other mods). I'm considering chartering an add-on, and if you'd like to bug some modder into doing stuff, that would be great.

I believe what Mugiwaxar meant, was that CustomMobSpawner is a core mod required for Mo'Creatures to work and while removing it removes the problem, it prevents Mo'Creatures from spawning in all dimensions, not just ME.