Easter eggs
Easter eggs are secrets in video games as a means of unexpected entertainment or a bonus.
The following is a list of easter eggs in Splatoon.
Basketball
On the Testing Area that can be accessed by pressing 
on the Equipment screen or whilst in Ammo Knights, there is a basketball hoop. If the player tosses a Sub Weapon, such as a Splat Bomb, into the hoop, their Inkling will say a celebration, much like they would if they were to splat an opponent in Turf War. A green sparkling effect will also occur around the hoop.
Blooper and Octorok
Hidden in various areas such as Zone 4 are stickers featuring the Blooper from Super Mario Bros. series and the Octorok from Zelda II: The Adventure of Link.
Password entry
Each number on the password entry screen for Private Battles plays a specific tone when the cursor is moved to it:
| Numbers | 5 | 0 | 6 | 1 | 7 | 2 | 3 | 4 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| Note | Lower B♭ | Lower D♭ | Lower E♭ | Lower G♭ | Lower A♭ | Higher B♭ | Higher D♭ | |||
These tones are not arranged in order or in a scale, as one would think, but are a bit more arbitrarily placed. It is possible to play the intro to Calamari Inkantation by moving the cursor between numbers in a specific pattern, which might explain the way the notes are arranged. The pattern is as follows:
7 6 7 6 7 6 7 6 5 6 7 6 7 6 7 2 3 8 7 6 7 6 7 6 7 6 5 6 7 2 3 8 3 8 3 2 3 8 9 8 3 2 7 6 7
Sunken Scroll flipbook
Each Sunken Scroll has a doodle of a Character on the bottom right corner. By flipping through the pages, one can see a flipbook-like animation showing the character flip around twice and turn into different ones. It starts off with the Zapfish, then changes to Judd, and finally, to Sheldon.
Squid Sister wave
To the left of the Dojo on Inkopolis Plaza, there is a studio where the Squid Sisters can be found chatting. By staying near the window, the sisters will eventually wave at the player. Using the first person view with Template:ZR allows one to zoom in on the scene.
