Puppy in pink unicorn costume

Puppy dressed as Mario characters (Luigi, Princess Peach, Gameboy)

Little dog wearing a shark costume

Hotdog costumes

Daschund in Bee costume

Very cute dog in flower costume

Dog in Darth Vader costume

Batman and Robin dogs

Dog wearing armor costume

Jail dog

Cute trick or treating ghost dogs on Halloween

Not exactly a costume, but very cute clothesline puppies

Fast food costume collies

Dogs wearing banana costumes

Dogs in Winnie the Pooh and Piglet costumes, very cute!

Dog in pilot costume with goggles

Arrrr a dog wearing a pirate costume

A dog in a Yoda costume this is

Frog Dog!

Pit bull in lion costume