Halloween Costume: Suits, Onesies & More

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Halloween Costume

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Man and woman wearing purple unisex adult onesie Pokeomon Gengar themed. Both looking at the floor.

Sonic the Hedgehog™ Adult Onesie

$54.99

(50 reviews)

A man is wearing an adorable Eevee onesie, modeled after the beloved Pokémon character. This adult unisex onesie is designed in a warm brown color, resembling Eevee’s fur, and features a fluffy beige collar mimicking Eevee’s mane. The hood includes Eevee's signature large brown ears, big black eyes. The onesie has a front zipper closure and convenient pockets at the front, offering both comfort and ease of wear. Perfect for Pokémon fans.

South Park™ - Stan Adult Onesie

$54.99

(50 reviews)

A man wearing a South Park Stan Onesie, red and brown hooded zip-up onesie pajama with a blue and yellow hood, yellow cuffs, a South Park patch on the sleeve, and brown pants, photographed against a light gray studio background.

South Park™ - Cartman Adult Onesie

$54.99

(51 reviews)

Man wearing grey Halloween men's suit with blood stains

South Park™ - Kyle Adult Onesie

$54.99

(51 reviews)

A smiling man wearing an orange South Park Kenny onesie with brown drawstrings and cuffs, standing against a light gray background. A small patch on the left leg reads 'South Park'.

South Park™ - Kenny Adult Onesie

$54.99

(51 reviews)

A man modeling a Ghostface-themed suit with a black, white, and gray mask pattern, a black shirt, a bow tie.

Sonic the Hedgehog™ Men's Suit

$129.99

(12 reviews)

Man wearing a Smurfs-themed suit on a white background

Superman™ - Man of Tomorrow Men's Suit

$129.99

(51 reviews)

Man wearing a colorful suit with a pattern of Pokemon ghost characters on a white background

The Ghost-type Pokémon™ Men's Suit

$129.99

(51 reviews)

Man wearing a black Batman suit with geometric patterns and a yellow shirt on a white background

Halloween Costume Ideas for the Whole Family

Looking for a Halloween costume that does more than the basics? OppoSuits' Halloween costume collection brings together licensed character onesies, suits, shirts, sweaters and blazers, from Pokémon and Batman to Sonic the Hedgehog and the Smurfs. Whether you want a full costume or something you can layer into a party outfit, there's a Halloween costume here for men, women, teens, and kids.

Why Choose a Halloween Costume from OppoSuits

Two costume formats: go all-in with an onesie, like Gengar, Charmander, or Pikachu, or keep it wearable with a full suit version, like The Joker™, Scooby-Doo™, or The Batman.
Officially licensed designs from Pokémon, DC Comics, Sesame Street™, Sonic the Hedgehog™, South Park™, Super Mario™, Minecraft™, and more.
Sizes for the whole family: men, women, teens, and kids, so everyone can dress up together.
Built-in group costume options: all four South Park™ friends (Stan, Cartman, Kyle, Kenny) as onesies, or Bert™ and Ernie™ as matching Sesame Street sweaters.
Original designs too: not every costume is licensed, Zombiac offers a classic horror look as a suit.

Good for

Halloween parties
Trick-or-treating
Costume contests
Group and family costumes

What to check before you buy a Halloween costume

A few things to check before you order, so you get the right format and size.

Styles	Onesies, suits, shirts, sweaters, and blazers
Licenses	Pokémon, DC Comics, Sesame Street™, Sonic the Hedgehog™, South Park™, Super Mario™, Minecraft™, Avatar: The Last Airbender™, Beetlejuice™, Ghost Face®, Harry Potter™, My Little Pony™, and more
Available for	Men, women, teens, kids, and unisex sizing
Delivery	See current delivery times on our shipping page

Onesie or Suit: Choose Your Costume Format

Not sure which format to pick? A onesie, like Charmander or Cookie Monster, is the most immersive option, ideal for a Halloween party or trick-or-treating where comfort matters. A suit version, like Pokémon or Superman™, gives you the same character without sacrificing a more put-together look, useful if your Halloween event doubles as an office party or a night out.

Looking for a specific format? Browse Halloween Onesies, Halloween Suits for Men, or the wider Halloween Outfits collection. There's also Halloween suits for kids and for teens.

Frequently asked questions about Halloween costumes

What's the difference between the onesie and suit Halloween costumes?

A onesie is a single, all-in-one costume piece for a bold, full-character look, while a suit version reworks the same character into a wearable jacket-and-pants set, better suited to events with a bit more of a dress code.

Are the character costumes officially licensed?

Yes, many designs are officially licensed, including Pokémon, DC Comics, Sesame Street™, Sonic the Hedgehog™, South Park™, Super Mario™, and Minecraft™.

Are there Halloween costumes for kids and teens too?

Yes, alongside the men's and women's sizes, there are Halloween suits and onesies sized for kids and teens.

Can I put together a group costume?

Yes, the collection includes built-in group sets, such as all four South Park™ friends (Stan, Cartman, Kyle, and Kenny) as matching onesies, or Bert™ and Ernie™ as a Sesame Street™ sweater pair.

When will my Halloween costume arrive?

Delivery times can change, so check the current estimates on our shipping page before you order.