Sheldon License

Sheldon Licenses are a type of currency introduced in Splatoon 3 that can be used to acquire new weapons in Ammo Knights, which differs from previous games where players instead used Gold.

Sheldon Licenses can be obtained via increasing both the player's level and each weapon's Freshness level. Each weapon costs 1 Sheldon License to purchase, though if the player wishes to purchase a weapon that currently doesn't match their Level, they can spend 3 Sheldon Licenses instead of 1.

In addition, there are also Gold Sheldon Licenses that can immediately unlock a weapon no matter what the player's level is. Owners of Splatoon 2 will immediately receive 3 Gold Sheldon Licenses, though it is currently unknown if there will be other means of obtaining them.