>Decidueye's signature move and Z-move are Ghost type

>>31588716
Water is so good already that it doesn't need help from a second stab nuke

> Sound is made of waves
> Waves are Water
> Wrestling is evil
> Arrows are nothing personel

Not everything has to fit a pattern.

>>31588757
>His attack involves cursed feathers/arrows rather than anything grass like, thus Ghost type

>Darkest Lariat is a wrestling inspired move rather than a generic fire attack, so it makes sense to make it Dark type for Incineroar

>Primarina attacks with giant energ- bubble ball, thus Water type

S'not rocket science.

>>31588716
That's not all:
>Decidueye got a new exclusive HA
>Primarina got a new exclusive HA
>Incineroar's HA is Intimidate

Moving back in time to the days of ORAS:
>Delphox's HA is shared by Klefki and Hoopa
>Greninja's HA is shared by Kecleon
>Chesnaught's HA is unique

>Chesnaught got one signature move
>Delphox got one signature move
>Greninja got two signature moves

GF loves to make one starter different from the other two when it comes to HAs and signature moves.

>>31590578
To be fair though, Intimidate is miles better than the signature HA for the other 2 Gen 7 starters, and Chesnaught had the best exclusive move between the Gen 6 starters (before they made Water Shuriken special, at least).

>>31588757
nerf Water types for Gen 8