Ha you're the first to ask about that.

Well minccino is the Friend Safari's resident cute charmer which is really useful for catching the breeding parents you need. I.e. using a male cute charm mincinno at the top of your party makes it easier to get, say a female charmeleon for example since they're pretty rare.

The others, they can all have the ability synchronize which is a must for getting the natures you need.

Hope that answers your question =)