Just met a hacker online who used Octoling and Hydra Splatling | Squidboards
It was on Arowana Mall. The Octoling had unique voice clips and everything. It was using the Hydra Splatling, an unreleased weapon. My team won though....

I’m not exactly sure how to answer some of the concerns regarding the Splatoon hackery and the last thing I want to do is unknowingly mislead people, so here is the thread where you can find all of the information I’m giving you. These people seem to know a lot more than I do regarding this, so if you’re still concerned give this a quick read!