Wii U Pro Controller

The Wii U Pro Controller is a controller of the Wii U that can only be used in the Battle Dojo mode in Splatoon.

Description
The Wii U Pro Controller is an optional accessory for the Wii U that serves as an alternative to the Wii U GamePad. It replaces the Wii Classic Controller Pro, and was replaced by the Nintendo Switch Pro Controller. It has the same overall button layout as the Wii U GamePad, in a more traditional controller layout, however it lacks motion control sensors, camera, NFC Pad, headphone jack and touchscreen.

Battle Dojo
In the Battle Dojo, one player can use the Wii U Pro Controller to play on the TV, to pop as many balloons as they can, against their opponent, using the Wii U GamePad. This is the only functionality available for this controller in Splatoon.

Features

 * : Primarily used to move the player's Inkling forward, backward, left, and right.
 * : Used for menus, such as the weapon select and pause screen.
 * : Allows players to transform into squids. In this form, Inklings are able to move faster through their own ink and jump farther.
 * : Allows players to splatter ink using their weapon.
 * : Allows players to use their sub weapon.
 * : Causes the player's Inkling to jump.
 * : Resets the camera angle, allowing for quick corrections.
 * : Used in menus to select specific actions and options.
 * : Used to deselect a chosen weapon in the weapon select screen.
 * : Can be used in Battle Dojo menus like the stick.
 * : Used to pause and resume in in a Battle Dojo match, and adjust the controls on the weapon select screen.

Trivia

 * Multiple Pro Controllers and a Wii U GamePad can be seen inside the Battle Dojo hanging on the wall. There are three white controllers,a black controller and a white GamePad on the left side and two black controllers on the right side.
 * Battle Dojo matches can also be played with a combination of Wii U Pro Controller and a Wii Remote Plus or Wii Remote with a Wii MotionPlus accessory, which was hinted at in the 26th Sunken Scroll. (pictured below) This allows the player using the Wii U Pro controller to have motion controls. To perform this, the player must hold down on the, hold down , and press and  as described on the Splatoon Tumblr, Live from Squid Research Lab.