|“||Divert the enemy with weapons like Splat Bombs or the Sprinkler.
Pro tip: You can try out the weapons at Ammo Knights before you buy.
— Splatoon's official website, 
The sub weapon is a secondary weapon in Splatoon and Splatoon 2. They use up considerably more ink than a main weapon, and as such, usually serve specialized purposes limited to specific combat situations and are not often used as a main method of inking the environment.
Sub weapons are deployed by pressing the button. If the sub weapon is throwable, holding down the button will display a trajectory to help the player aim the weapon. If the sub weapon is not throwable, it will be placed on the ground.
Sub weapons consume a great deal of ink, so it may be necessary to monitor the ink supply before and after deployment of a sub weapon. When the ink supply becomes sufficient for using a sub weapon, a sound effect will play and a red light will show on the ink tank.
List of sub weapons
|Splat Bomb||A basic bomb that explodes after a short period of time. It can be rolled or thrown. The explosion timer will only progress while the bomb is touching the ground.||✓||✓|
|Suction Bomb||A bomb that can be attached to any surface. It explodes after a moderate period of time, and has a larger blast radius than the Splat Bomb.||✓||✓|
|Burst Bomb||A bomb that explodes on impact. Multiple Burst Bombs can be thrown without having to refill the ink tank. They deal less damage than other bombs; two direct hits or three indirect hits will splat an opponent, or they can be used in combination with the main weapon.||✓||✓|
|Seeker||A bomb that chases a target before exploding. It leaves a trail of ink that the player can use to travel quickly.||✓|
|Curling Bomb||A bomb that travels in a straight line across the floor, leaving a trail of ink and bouncing off of walls and obstacles. It explodes after its timer expires. The maximum distance of the Curling Bomb can be shortened by holding the deployment button to 'cook' the timer before release.||✓|
|Autobomb||A bomb that walks towards any nearby enemies before exploding.||✓|
|Ink Mine||A bomb that hides in ink once planted. It deals damage to enemies that get too close. As of Splatoon 2, the Ink Mine also applies a tracking effect to its victims, letting everyone on the user's team know where the victim is.||✓||✓|
|Disruptor||A bomb that gives negative status effects to opponents. Affected enemies will suffer from reduced mobility and a reduced ink recovery rate.||✓|
|Toxic Mist||A bomb that releases a poison mist, which causes negative status effects to opponents that come into contact with it. Affected enemies will suffer from reduced mobility and gradual loss of ink supply. Unlike the Disruptor, the mist remains active for a short time after being used.||✓|
|Point Sensor||When thrown, this object explodes in a spherical cloud. The cloud tags enemies with a tracking effect that shows their location to everyone on the user's team.||✓||✓|
|Splash Wall||A barrier made of falling ink. It blocks enemy movement and enemy fire.||✓||✓|
|Sprinkler||The Sprinkler continually sprays ink in a circular area around itself, in a staggering motion, until it is broken by enemy fire or the deployer gets splatted. It can be thrown onto virtually any surface.||✓||✓|
|Squid Beakon||A device that allows the user and their teammates to Super Jump directly to its location.||✓||✓|
|Fizzy Bomb||A bomb that is capable of exploding multiple times. The bomb can be held and shaken like a soda in order to increase the weapon's explosive potency, increasing the number of times it can explode.||✓|
|Torpedo||Device that transforms into a floating homing missiles when within range of a target. The missiles itself is incapable of splatting an opponent alone but will deal a large amount of damage. The missile can be shot down by opposing players.||✓|
|Bomb Range Up||Allows bombs, Point Sensors, and Disruptors to travel farther when thrown.||✓|
|Damage Up||Increases damage dealt by weapons.||✓|
|Ink Saver (Sub)||Reduces the amount of ink consumed by sub weapons.||✓||✓|
|Sub Power Up||Improves the performance of each sub weapon in multiple ways.||✓|
Names in other languages
|French||Arme secondaire||Secondary arms|
|Italian||Armi secondarie||Secondary weapon|
|Spanish (NOE)||Arma secundaria||Secondary weapon|
|Portuguese||Arma secundária||Secondary weapon|
Sub weapons come in sets with main weapons. These lists show which sub weapons come with each main weapon.