Inspired by this adorable picture:

What ways can you see Pokemon contributing to society besides battle?

Sweet! Monferno as a helper to push a kid in a wheelchair.

It’s already canon that Electric types help at power plants and that some companies use strong Pokémon like Machamp to help move heavy things, so I can definitely see other ways that Pokémon could help.

My favorite comes from this:

"Aggron is surprisingly protective of its environment. If its mountain is ravaged by a landslide or a fire, this Pokémon will haul topsoil to the area, plant trees, and beautifully restore its own territory." - Sapphire

Aggron as an aggressive city cleanliness enforcer (since the city is its 'territory' if a Trainer lives there). Some guy drives through, tosses a bag of McDonald's out the window onto the curb and keeps going? Two seconds later his car is being chased down by a 7-foot, 800-pound, incredibly angry environmentalist.

Also Hypno/Musharna lines as somnologists (sleep doctors), Smeargle as professional artists, Grimer/Muk as trash collectors (this one is canon at least to Alola)...

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That first one seems like a hazard - one reason to keep big Pokemon in their balls!