Version 5.4.0 (Splatoon 2)

Version 5.4.0 is an update for that was released on 2021-02-24 at July 27, 2024. It was announced on social media on 2021-02-18.

Balance changes
"* We observed changes after distribution of Ver and made adjustments to slightly lower the fighting power of certain weapons that could hold the battle line over a long period of time from further away compared to other weapons.
 * In addition, in order increase[sic] the variety of weapons being selected, we made adjustments to several weapons to increase their competitiveness with the most popular weapons.
 * We will observe the changes after this update and make further adjustments to Splatoon 2 in the future."

- Nintendo

Main weapons
Specifications for some of the main weapons have been changed.

Sub weapons
Specifications for some of the sub weapons have been changed.

Special gauge
Points required for using specials have been changed for certain main weapons.

Multiplayer

 * Fixed an issue in Starfish Mainstage in which it was possible to enter the opposing team's base by jumping from certain walls.
 * Fixed an issue in Manta Maria in which it was possible to enter the opposing team's base by jumping from certain walls.
 * Fixed an issue in Kelp Dome in which it was possible to enter the opposing team's base by jumping from certain walls.
 * Fixed an issue in Skipper Pavilion in which it was possible to enter the opposing team's base by transferring between certain walls.

Trivia

 * The English translation of the patch notes accidentally combines the Squeezer family and Dualie Squelchers family's notes, thereby removing the Squeezer's patch notes.