Interesting Mario cameo in Splatoon

The Off Camera Secrets series from Shesez on Youtube is well known for exploring unaccessible areas of various Nintendo games.
He recently did a video on Splatoon.
And as we can see, Mario appears behind the Amiibo box.
I thought it was interesting!

https://youtu.be/5HpiYSvyqxU?t=4m24s

Is it worth mentionning on the Wiki?

Definitely, yes. Should be in the "List of Mario references in video games" article.