This list showed type combinations that have yet to be used by any Pokémon. For example, to date there is no Psychic/Poison Pokémon, just as there is no Psychic/Bug dual-typing.
The missing type in each list is: Bug, Normal, Fire, Poison, Fairy, Normal, Bug, Normal, Fairy, Electric, Ice, Dragon. Indexing in by the given number fittingly spells out UNFORMULATED.
|The answer is: unformulated|