Same thing but ground to flying
It's just Gamefreak logic.
Not everything has to line up with the core series games, as is evident from the anime and other spin-offs. This was probably also for balancing purposes.
The game is based on younger kids so they got rid of type advantages,disadvantages and immunities .Now in pq in every area gives a stat boost to every Pokemon of your team that is a certain type
Home of Fire and Fighting types
Pidgeotto gets a stat boost!
Wartortle and sandshrew dont
Here is a link that shows every type bonus on every location