Let's talk player animations.
Every weapon has a set of animations, particularly universal ones that they pull from designated for their class. A shooter will always pull from a universal animation on firing their gun, a slosher will always slosh the same, etc. There are however rare cases where an animation will be special, created exclusively for that one weapon and one weapon alone. For instance the Snipewriter has one such special animation when you fire your first 4 shots, as your inkling does not recoil from the shots. Do note that this specifically refers to how your player interacts with the weapon, and not how the weapon itself moves (so something like Luna's shell opening and closing whenever fired does not count as a player animation).
That being said, there are some weapons that can have around 2-5 of these special animations, but for a lucky outlier, this number is way higher.
The Ballpoint Splatling has the most unique player animations, at around 16. Due to the lack of a tank on the weapon, every single animation is changed slightly. The way you move, stand, charge, even something as simple as being in enemy ink is all changed when using this weapon. Talk about a lucky gun.
/j
