Arylett, you're not alone! Humans will need benefits, yes. Most likely equipment cannibalized from their days as trainers, as Storm says. They've got plenty to work with, but here are some of my ideas so far.
The TM Driver. Modeled after the Snag Machine from Pokemon Colosseum, it fits onto a human's arm, with a pre-attached plate of body armor that covers the upper torso as well. Using the elemental gems as a power source - the ones introduced in Gen V - it allows humans to use pokemon moves via the use of TM/HM disks,
as long as they are the same type TM/HM as the gem being used as the power supply. The device has not been perfected yet, and as a result, TMs are once again single use only. On top of that, the gems will require recharging between uses. Making the device better suited to self-defense, since it performs poorly in extended confrontations. Which humans should be trying to avoid anyway, being as frail as they are compared to pokemon.
Instead of experience, my idea for humans is to have their strength measured by how many items they can carry and use in battle. Drugs like X Special and Dire Hit, to increase their battle performance (steroids, basically
), Held Items like the Smoke Ball, so that they can flee from battle easier, TM/HM disks for use with the Driver, and Poke-Gear styled functions like a pokemon radar, itemfinder, and other features. These items could be dispensed freely to the population, or acquired through some kind of underground market via money. How that happens is Storm's call.
Additionally, there could be other customized gadgets they could acquire or invent. Like an ability that forces pokemon to forget their moves temporarily Move-Deleter style, or armor to enhance their latent psychic potential enough to let them use limited telekinesis like they made for Mewtwo. Humans have technology on their side here, so honestly I can't understand why there's so little demand for them. D=<