>rows of pokemon all huddled together with their own types

Could this help shed some light on some alolan and Gen VII Pokemon?

Marowak is already confirmed a fire type and is lumped together with other fire Pokemon.
Diglett and Dugtrio are alongside rock types.
Geodude, Graveler and Golem are in between a rock type and electric types, which have been their rumored typing for a while now.

Does this mean the anchor-mon at the bottom of the image is part water?