A lot of player play more than one Niantic game. As mechanics are similar existing hardware could used cross games.
Suggestion is to make Plus/Ball etc available for harvesting materials and autoslaying small monsters - HaTs and big monsters stay exempt.
That sound is interesting suggestion.
But Monster Hunter Now is a title Capcom owns the copyright to, so it would be very difficult to use a device released by The Pokémon Company.
For example, it might be possible if there was precedent for a collaboration between Monster Hunter and Pokémon is one of the games.