Halloween Costume: Suits, Onesies & More

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Halloween Costume

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A kid is wearing a blue sesame street onesie resembling Cookie Monster.

SpongeBob™ Frenzy Teen Boys' Suit

$114.99

(3 reviews)

Teen wearing purple teen boys suit with a The Joker theme and green buttons. Further he is wearing a green tie and a white shirt. Hands in pockets of pants.

A Nightmare On Elmstreet™ Men's Shirt

$31.49

(6 reviews)

Man wearing Halloween Shirt with Friday the 13th Print

Super Mario™ Bad Guys Men's Shirt

$64.99

(51 reviews)

Men wearing blue summer shirt with Super Mario icons

Super Mario™ Icons Men's Shirt

$41.99

(28 reviews)

Man wearing summer shirt with Nickelodeon characters print

Nickelodeon™ Cartoons Men's Shirt

$41.99

(28 reviews)

Men wearing grey Halloween blazer with blood stain print

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.