Costume Quest

The following is how to acquire each costume:

Auburn Pines:

1. Robot: This is the costume you start out with. You'll get it right after you choose your character.
2. Knight: After you save Everett from Travis you'll not only destroy the roadblock and get Everett but you'll also receive Everett's costume, the Knight.
3. Statue of Liberty: This is the first costume where you'll actually need to find the materials. The first piece is in the sewer system. You'll find the sewer system down the street from the patriotic costume party. You'll need to switch to the knight costume. Once you switch to the costume hold to shield your costumes from the water and walk through. As soon as you enter the sewers there's a pathway to your right marked by a green light, go down it. There's a coffin down this path, open it to get the cloth. Follow the sewer down further and exit by way of the ladder that is conveniently placed at the end. Once you get out there will be a kid in an Abraham Lincoln costume standing there next to a ramp. Talk to him so that he moves out of the way and then proceed to go over the ramp with your robot costume's roller skate ability. Go left once you go over the initial ramp to go over another ramp that leads you to a coffin. Inside the coffin is the cardboard. Continue to follow the path to another kid in an Abraham Lincoln costume. Talk to her and she'll give you the feather duster, the final part of the costume.

1. Astronaut: This is a story related costume that you're required to get. When you get to the mall area follow the path until you get to the area where all the people that are on the platform past the police officer. Talk to all 3 people in the area and each will give you a different piece of the costume.
2. Ninja: This is another story related costume that you can't miss. In the arcade there is a secret passageway that opens up once you defeat the monsters inside of the arcade. Defeating BoJonn in the arcade will get you the scarf. You must defeat him to open up the passageway anyway. Inside the passage you'll meet Lucy who joins your party and also gives you the sweatpants for the costume. The final piece is the rope and it's given to you by the conductor of the railway that goes around the mall. Once you get back his train car by reaching the end of the passageway and defeating the enemies inside he'll give you the rope.
3. Unicorn: This costume is probably the hardest to find in the game and it's hard to explain where the pieces are so below is a video showing you how to obtain the costume. Thanks ScathingAccuracy for the video.

1. Fries: This is also a story related costume. There is a French Fry stand run by a man named Chip located near the row homes in Fall Valley. Talk to him and he'll give you the costume.
2. Black cat: You'll earn this costume after completing the Creepy Treat Card Collection. You complete this quest by owning every single card. See Decked Out for more information on how to obtain these cards.
3. Pumpkin: Each piece of the costume is given to you by a scarecrow located in each of the 3 areas. The first scarecrow is located in the Auburn Pines graveyard. Talk to him and he'll give you the paper mache. The second scarecrow is located east of the costume contest in the Autumn Haven Mall. He'll give you the orange paint. The third and final scarecrow is located in the woods behind the carnival in Falls Valley. To get there you'll need to have beaten the carnival part of the area by liberating the ferris wheel. This scarecrow will give you the leaves.
4. Vampire: This is another hard costume to find. The first piece is easy though. The scary fangs are found behind a railing on the west side of the ferris wheel. For the other two pieces you'll need to beat the enemies on the ferris wheel so that you can continue towards the corn maze. As soon as you go through the first dark corridor right after you get past the ferris wheel walk north. Keep walking until you reach the stone fence that separates you with the small town where you trick or treated. Now walk east and you'll find a cave entrance. The black cloth is found in that cave. The final piece is located down a path that's just south of the final scarecrow. Follow the path and you'll get the white make-up.
5. Grubbin: This is a story related costume. In the corn field maze after you rescue all 3 of the good grubbins you'll receive this costume from the grubbin that is located near the front entrance to the maze, near the big tree..