[V13 new mons locations]

Gothita is in the grass on the Isle of Angels north from Kristilline Town, don't know if there is any other location though.

 

[V13 new mons locations]

I just found out Pincurchin has been set as a 1% land encounter on Terajuma Pier which - call me dumb if it ain't right - doesn't have any land encounter tiles.

 

 

 

Edit : Just verified by replacing a tile by grass and yep, it's here.