Finally finished this, I hope I haven't forgotten any of Envy's CR! Let me know if I have and I'll think of something for them too (or if I've totally missed the mark with any of these).
France: Nicest bottle of wine he can afford + mostly original piano composition
Tulio: New deck of cards
Miguel: Game Corner coins
Lust: Scarf and matching gloves (reddish-burgundy)
Nanao: Leather-bound book of Johto and Kanto legends
China: Box of assorted teas
Heather: Good luck charm (bracelet/loop of braided leather cord, with flat, carved wooden Togepi and star hanging from it) + Small tube of glitter don't eat this, Heather
England: Book about Pokemon-world piracy
Other Father: Booklet of sheet music for piano (Johto themed, of course)
Henry: Tropius egg (egg moves Earthquake and Hyper Beam included if you want) + pack of cigarettes
Merlin: Pair of gloves (navy)
Tohru: Self defense instruction manual
Kimblee: Box of
snappersArcher: Note reading "Turns out we're from the same version of Amestris, so neither of us has lost our minds and hallucinated it all. Also, watch out for people in red suits calling themselves Sandyclaws, I've heard they're spying on people. -Victor"
Winry: Little mechanical novelty toy
Hughes: Disposable camera
Rapunzel: Bundle of candy canes
Roy: Book of matches, all of them already used and put back in
Katara: Potion with attached note "Next time we meet you're going to need this"
Edward: Stale gingerbread man with an arm and leg broken off. Ed will also be receiving his old Dratini, Aqua, back without Envy's knowledge because that's what Envy gets for teaching his Pokemon to be independent thinkers.
Alphonse: A person-shaped cookie cutter that is twice the size of Ed's gingerbread man
Harry Dresden: Cheap plastic Magikarp Pokegear charm