Well I guess the talkaction can summon unsummonable monsters but it can't set them as master :p
Full list if anyone want it:
['Skunk'] = {level = 25, mana = 200},
['Rat'] = {level = 25, mana = 200},
['Badger'] = {level = 25, mana = 200},
['Snake'] = {level = 25, mana = 205}...