>picture moderately related, skip to bottom

>Trials:
Ilima - Normal
Mallow - Grass
?? - Dragon
Sophocles - Electric
Lana - Water
?? - Ghost/Fairy
Kiawe - Fire

>Grand Trials:
Hala - Fighting
Olivia - Rock
?? - Ground
?? - Flying

>Ultra Beasts
UB01: Psychic
Both UB02: Bug
Pink and white UB: Ice
Green UB: Steel
All black UB: Ghost
White-haired UB: Dark
Mouth-stomach UB: Poison

7 + 4 + 7... all 18 types.

I'm sure some UBs will be dual-typed. But I'll be damned if they'd miss an opportunity to make every type relevant.