Nine of them is the pure Rock type.
2 dual type Pokemon have the Steel type as primal:
4 dual type Pokemon have the Steel type as secondary:
All the types of Pokemon in the Pokemon Go game are described here!
This table helps compare abilities of different Pokemon types during battles in Gyms!
To check full lust of Pokemon in the Pokemon Go game with usefulinformation about every species, visit the "Full Pokedex" article.