Ash(probably most known):
-A Rope(Hoenn on, pretty sure, probably based off the escape rope from the game)
-Pink Gloves(Ever since first episode, used them when Pikachu was angry at him in first ep and when Pikachu had a fever in a later ep)
-Red Pokeball Piece(Kanto, i think, split a Pokeball in half and Gary and Ash each kept one half as a sign of their rivalry)
-Badge Case(Every region, where else does he keep it?)
-Swimsuit(Every region)
-Food(his mom packed him a bunch of crap in the first ep and in a much later ep he was looking through his backpack and you could see the food)
Misty(hardly know anything about):
-Pokeballs
-Swimsuit
-Togepi's Food(I'd assume?)
Okay, really don't know too much for Misty.
Brock(I think Brock has the most stuff.....)
-Swimsuit
-Pokemon Food
-Books
-Sleeping Bags(Apperantly for EVERYONE?)
-Tablecloth/Dishes
-Tent
-Cooking Utensils
-Frying Pans and such
-Picnic Blanket
Tracey:
-Sketchpad(obviously)
-Swimsuit
-Pokeballs
-Cooking Utensils
-Frying Pans and other crap
-Extra Pencils
Max:
-Uh, what DOES he have?
May:
-Ribbon Case
-Pokeballs
-Swimsuit
Dawn:
-Pajamas
-Pokeballs
-Swimsuit
-Ribbon Case
