While I made the costumes for the rest of the characters:
Cotton Candy: Puffball (Battle For Dream Island)
Flashlight: Nacho Cheese
Jack: Jack In A Box
Key Chain: WAW (Object Invasion)
Thing: Tiery (Animatic Battle)
Walky Talky: Among Us
Yogurt Cup: Zombie Yogurt Cup

Sundae: Uzi Doorman (SizzleFlicks)
Toothbrush: Beaver (danjhelylazaladraws)
Vanilla: Pumpkin (ichalelele)

Journal: Wizard (dr-fizzovich)
Lantern: Lampent (DiamondGlare_7-7_)
Quince: Scrooge McDuck (GeraldGSD)
Slimey: Minecraft Slime (glitchystarri)
Stampy: Youtube Icon (YouTube icon)

Costume Ideas:
Avocado: Pinkie Pie (Pinkie Pie)
Bocce Ball: Disco Ball (Dragon1200)
Candle: Pumpkin (Tropical)
Cassette Tape: Tapey (BFDI Productions)
Circle: Chocolate Chip Cookie (Dragon1200)
Drinking Bird: Angel (sandrick670)
Crane Flower: Chicken Leg (VJ)

HachHachJay (Bouncy, Pom-Pom)
ThatPerson (Shuriken)
Chorata (Elderberry, Fishbowl, Filler)
danielrapitisofficial (Planty, Watermelon)
pearcerfaucher (Red Circle, Round Square)
Ploopy Zuki (Radio, Hairball, Lipstick)

Credits:

Jacknjellify (Foldy, Marker)
AnimationEpic (Test Tube, Bot)
FusionAnimations (Cringe Pill, Shoe, Blood Bag, WAW)
GreenyGuy (Bob-Omb, Chocolate Milk Carton, Doorstopper, SPAS-12)
WhoEvenIsStan (Triangle)
wuggolo (Umbrella, Balloon)
Brybee (Latte)
YellowAngiru (Card)