For my own reference, although if you see this and want to lend, I'm happy to take!
Baline (plate)
Balloonanimal (attatch to pinata pet)
Batz (remove after 11+)
Baxter (3+)
Baylien (random plate)
Billy (150+)
Bitty (Easter 30+)
Blake (22+)
Blissaur (Easter 60+)
Bonbon (random plate)
Booty (Plate)
Boris (31)
Brain Freeze (150 ice cream)
Bubbles (underwater 112)
Buckaroo (190+)
Bugsy (minipet pet)
Bullo (Daisy)
Bunns (Plate)
Butters (41+)
Buzzy (bee 51+)
Cantoo (plate)
Cerberus (plate)
Cheese (Cheese marapop to Cheese fasoro)
Chevron (220+)
Chickle (plate)
Chidder (plate)
Chook (600+)
christmas (200+)
Chubular (plate)
Clovite (Leprechaun 20+)
Coal (random plate)
Corny (plate)
Cremul (plate)
Crumbs (plate?)
Crush (valentine 50+)
Daniel (780+)
Dantiz (1000+)
Dasher (snowy)
Decapitate (30+)
Deci (10+)
Delayed (820+)
Devil (250+)
Diamond (80+)
Drab (56+)
Drenched (62+)
Drowsy (176+)
Efall (gallery)
Egbert (plate)
Eggy (590+)
Electro (lightning)
Elf (plate)
Ember (110+)
Erto (300+)
Fandor (900 +)
Fat (feed fast food)
Fild (attach LE)
Filonder (960+)
Float (158-204)
Flobberbat (1100+)
Floof (Hairy)
Floss (580+)
Fluffy (200+)
Frolan (frostfire 10+)
Fwidman (plate)
Gamma (random plate)
Gargrunt (plate)
Gator (plate)
Gazelle (?)
Gemma (?)
Gingerbread (120+)
Gladie (Plate)
Gleam (plate)
Glitch (attatch to arcade decadal)
Gobbled (random plate)
Gobby (400+)
Googlag (unattach from mutant)
Goop (plate)
Gruff (plate)
Gumball Addict (original 43)
Gummi (plate)
Halloween (click pumpkin in inventory)
Halloweenie (plate)
Happilo (?)
Happy Maraween (play w/ retro beezelbub plushie - I have carpenter)
Harmoni (random plate)
Hart (valentine)
Heart (love)
Hearty (plate)
Helloth (plate)
Hethe (plate)
High (230+)
Hodge (251+)
Holly (277+)
Houo (plate)
Husband (break groom doll - I have Carpenter!)
I Love my minipet (attach any to love pet)
I was bad (?)
Inferno (Fire)
Irkette (plate)
Jacko (940+)
Jezebel (470+)
Jinn (7+)
Juju (random plate)
Kade (plate)
Keech (pla

For my own reference, but if you are lending any, let me know!

Parpy (plate)
Pat (leprechaun)
Pearls (46 original)
Peiko (500+)
Phantasm (phantom)
Pinkal (270+)
Pinto (attach)
Pixel (560+)
Plug (50+)
Plugged (plate)
Plynx (520+)
Poani (random plate)
Pongin (700+)
Poop (one of each)
Possessed (break doll - i have carpenter)
Prancer (127+)
Princess (240+)
Pudine (20+)
Puffnut (plate)
Pumpkin (980+)
Pumkitty (666)
Pumpkin Ed (1050+)
Pumpkin wiz (plate)
Pyri (90+)
Quiln (plate)
Rainbow Zax (rainbow)
Rat (800+)
Reginald (random plate)
Rejected (plate)
Reon (stonage 75+)
Robot (robot pet exchange)
Rock (plate)
Rocket (148+)
Rubble (15+)
Rupper (plate)
Ryno (?)

COMPLETED: Harmony TC, Underwater TC, Imperial TC, Haunted TC, Carnival TC, Musical TC, rainbow TC, Circus TC, Apocalypse TC, Wizard TC, Winter TC

Only for ones I have opened:

MEDIEVAL TC:
Anvil
Armour
Ceremonial capelet
Gem capelet
Light armour
Medieval Skirt
Medieval Top
Medieval tunic
Medieval Vest
Medieval Wig
Nimbus Skirt
Peasant sweater
Regal armour
Royal armour
Royal Vest
Silver trim capelet
Steel armour
Thor

BEACH TC:
Beach Glowing egg
Black Polkadot Swim shorts
Black strip Swim shorts
Books Tank Top
Breezy Tank Top
Camouflage Swim shorts
Cross tank top
Flag Tank Top
Giant hot dog
Happy pool party stamp
Heartbreakers Tank Top
Hot dawg
Illuminot Tank Top
Lord splishy splashy trading card
Mankind
Muscle Tank Top
No newths stamp
Pool party
Pool rules
Rainbow bikini
Rich Tank Top
Rose Swim shorts
Skulls Tank Top
Summer romance
Sunset Beach Glowing egg
Swim shorts
White Polkadot Swim shorts
White strip Swim shorts
White Stripe Swim shorts


LEO TC:
Black Leo Shoes
Book of Leo Fashion
Leo Contact Lenses
Leo Hair Extension
Leo Jacket
Leo Steak
Leo Wig
Lion Wig
Woodland Hair Extension

POOL TC:
Black Polkadot Ruffle Top Swim Dress
Blue Checkered Jammer
Camouflage Swim Briefs
Gingham Speedo
Navy Stripe Jammer
Ruffle Top Swim Dress
Watermelon Juice
Watermelon Socks
White Checkered Jammer
White Polkadot Ruffle Swim Dress
White Polkadot Speedo
White Wave Jammer

WONDERLAND TC:
Alice smock
Wonderland shirt

HALLOWEEN TC:
Wounded Skin

CAPRICORN TC:
Capricorn Bikini Bottoms
Capricorn Blouse
Capricorn Fish Ears
Capricorn Horns
Capricorn Scale Tattoo
Capricorn Shoes
Capricorn Tail
Capricorn Top
Capricorn Wig
High Capricorn Shoes
Ring of Water

GALACTIC TC:
Galactic Costume
Galactic Dress

PARTY TC:
Party Belt
Party Runners
Party Shoes
Party Skirt
Party Trousers

ROYAL TC:
Emperor Cake
H