This is a sub-page of Splatoon.
There are 18 unused weapons in Splatoon, 12 of which are unique. They're likely for testing. Watch on YouTube
Here's what they are in the video.
Shooters#
There are 5 shooters, 1-4 are duplicates of each other.
NormalShotAdjust1-4 - Splattershot Jr, 52 Gal, Splash-O-Matic, Aerospray
NormalShotAdjust5 - 96 Gal
Blasters#
NormalShotAdjustExplosion1 - Luna Blaster
NormalShotAdjustExplosion2 - Blaster
NormalShotAdjustExplosion3 - Range Blaster
Chargers#
There are 4 chargers, 2-4 are duplicates of each other.
ChargeShotAdjust1 - Bamboozler
ChargeShotAdjust2-4 - Squiffer, Splat Charger, Eliter
Rollers#
RollerAdjust1 - Inkbrush
RollerAdjust2 - Dynamo Roller
RollerAdjust3 - Splat Roller
RollerAdjust4 - Carbon Roller
Sloshers#
There are 2 sloshers, they're duplicates of each other.
BigBallAdjust1-2 - Slosher
(Source: Diam)