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bibis got herself kitted out with all the standard adventure gear you might expect. she keeps a sleeping bag rather than a tent since she likes being out under the stars. she doesn't usually head *too* far from civilization but shes keeps at least a couple days worth of canned/non perishable foods on her and a few fresh ingredients if she wants a sandwich on the road.
side note, whatever food bibi makes is apparently edible, if not good to most pokemon, but people tend to find it revolting for whatever reason. one time nemona ate a meal bibi made to try and fuel up before they battled together and it sent her straight to the nurses office. bibi declared herself the winner by TKO
i'd imagine if she were ever in a region outside paldea she'd be all stocked up on repels. keeps a smokeball on her lead when out adventuring in case things get dicey, and she's held onto her masterball for similar reasons. in terms of what pokeballs she favors heal balls are her #1 so whatever new friend she made is all patched up. aside from that it's mostly practical stuff, so ultra/quick/dusk balls. she keeps lots of medicine too, the kind for people and pokemon. potions for her partners and lots of disinfectants and bandages for her. willing to bet she has at least 1 prescription to take regularly. (still too lazy to research illnesses, oops)
in her wallet are a bunch of tiny printed out versions of photos from throughout her journey. selfies with friends/gym leaders but also the occasional photo of what seems like empty wilderness, caves, or endless sky, which is just b taking commemorative photos of places she's explored that are dangerous or hard to reach
rolls of stickers are in there too, she decorates her pokeballs and phone cases with them.
finally you got her battle related shit, choice items, light clay, life orb, weather rocks y’know the drill. lots of vitamins and fresh start mochi since she likes to experiment with her partners strengths regularly.