In my opinion it is actually worthless to evolve your monster after they reach max pop. The reason is it seems like the stat is for each one in the pop. So a lvl. 4 Monjo with a pop of 3 does 85 times 3. While if you evolve to a Rumbaro you only have 85 times one(also no stat improvement on evolution). If you want the evolved forms it is better to search for them instead of evolve them. So my complaints would be to add to the max pop of evolved forms to give you a reason to evolve. Second give stat boosts when evolving. Also there should be an option to level up with out evolving. I give this a 3/5.