>>29322447A-Dugtrio, providing it's bulkier than the usual Dugtrio (Fairy typing would definitely help), and if terrain wars discourage the use of flying and levitating mons (assuming it also gets Arena Trap); Ground and Fairy make a great offensive STAB combination (hit 2 totems SE and 2 others normally), and it might be the only way perish trapping is possible within the Alola Dex.
>>29314583On a side note, the fact UB's were listed doesn't make them mons nor does that make them catchable. The new ball might very well be related to the box legendaries' forms/pre-evos, akin to Manaphy's special egg, plus non-Pokemon with battle data aren't new at all to the series - studio props in BW2, Bittercold and Dark Matter in PMD; I doubt that kind of precedent hadn't got Ishihara and pals' OK going forward.