Maxing out happiness however, usually takes a while. Not only does a Pokémon with maximum happiness fight harder and land big attacks more often, but it’s also a handy way to evolve several of them. And ensuring that your Pokémon are happy, is something worth doing.
Creatures who like any other organism with a hint of sentience, just want to be happy.
They may be battle monsters that have the power to break the rules of reality and fit nicely into a carry-sized pokéball, but Pokémon are also living creatures.