DLC List

See littlebigplanet.fandom.com/wiki/Secret_Costumes

Includes some Unused DLC Costumes:

Director’s Costume (LBP1)
Sackicorn Costume (LBP2)
American Footballer Costume (LBP2)
Kangaroo Costume (LBP2)
Yeti Costume (LBP2)

Total Costumes:

Sackboy 548 Big Toggle 41 Little Toggle 39 Oddsock 31 Swoop 25

— LittleBigPlanet 3 Adds Content from First Two Games for Free.

It includes the “full collection” of costumes, tools, materials, objects, decorations, stickers, and backgrounds that were available in the story modes for LittleBigPlanet and LittleBigPlanet 2. This also includes everything from the base games that didn’t require DLC to acquire.
First, head to the Pause Menu, then go to Settings, select My Unlocks, and then choose “Unlock LittleBigPlanet Content” and “Unlock LittleBigPlanet 2 Content.” Once you have selected both of the options, they will automatically unlock the bonus content for the game.
The unlocked bonus content doesn’t include any of the story mode levels from either LittleBigPlanet or LittleBigPlanet 2 or any of the DLC content either.