Outfits look like simple cosmetics in Another Crab's Treasure. They are purely aesthetic and have no use or additional effects for Kril when equipped.
Another Crab's Treasure | All Outfit Locations | How to Unlock All Costumes Guide
However, you can't find every outfit at the beginning of the game, as most of them are locked behind boss fights, while exploring or buying them in a shop. There isn't even a list like there are for shells, so it's impossible to know how many outfits there are until you've encountered them all.
To help you get started or see what else there is to do, here's the full list of outfits we discovered while playing Another Crab's Treasure, their location, and any additional details.
Location: You get this the first time you pick up the Fork.
