No it will not work. I don't think Splathax can detect 5.5.2 or the codehandler and it has been discontinued. However, you CAN use Splat-AIO its worked fine for me so I suggest that! But be aware you CAN you CAN I REPEAT CAN be BANNED from Splatoon when using this so be careful. Good Luck!
Also if something happens to your account or your Wii U I or the creators are NOT responsible for any thing that happens