Here is what all the amiibo unlock in Splatoon 3

destructoid.com:

I knew these figures would come in handy, here’s the Splatoon 3 amiibo unlock list!

So the amiibo functionality is very straight-forward in Splatoon 3, as it has been in the past. All you have to do is turn around when zoning into the main hub city: you’ll see an action figure-like amiibo stand. Interact with it, and the game will ask you to scan an amiibo figure. Scanning a Splatoon amiibo (full list below) will bring that character into the game world momentarily.

If that figure isn’t registered or is registered to a new game, you’ll need to go through the process to link it to Splatoon 3 (which usually just includes a few quick taps). In addition to proving cosmetic rewards (which range from shoes, to headgear, to upper body clothes), you can also “pose with your amiibo for pictures.”

Below is a list of what each figure provided with their unlock rewards. Four total figures did not scan properly or provide a reward: we’ll further investigate this as the game launches: it’s possible that several figures offer overlapping rewards. Item specifics can be found in the gallery above following each figure appearance.

When attempting to scan a non-Splatoon-amiibo, the in-game prompt notes: “Please tap an amiibo that is compatible with Splatoon 3.”

This isn’t the end, either, as three additional amiibo figures are being released by “this holiday.” As of publication, they have not been dated in the US.

Once we can get proof of what they do in-game, we’ll add them here.