This mod for Minecraft 1.12.2 brings some of the things from the world of Splatoon (Nintendo's ink-redible third-person shooter) into Minecraft. The mod is still only in v1.0.0 though, so I've only been able to add all 16 color varients of the classic Splattershot, 16 different ink colors for ammo, and a very basic Squid Form mechanic.
There is also a new creative tab and recipes so you can easily make or find the weapons and ink to use.
-Any color Splattershot can replace any block with wool of it's color
-A Squid Form that allows you to gain invisibility, a speed boost, and obtain ink if you already have some in your inventory. Unfortunately, this isn't a "hold button" key bind, so you have to repeatedly tap LCONTROL (default Squid Form button) to remain in Squid Form.
-new crafting recipes i guess