Custom Stages is the 133rd TARS comic, where Kirby makes a stage in SSB4.
This comic was made in the span of 4-5 minutes.
This comic is marked as mature on Deviantart for obivous reasons.
The stage used in the comic is not Poyo Rides. He found it on Google Images and decided to use it.
Poyo Ride claims in the Deviantart description that he has made a Twin Towers custom stage. Dyna Blade's Facebook further proves this, as a photo shows a Twin Towers Custom Stage. https://www.facebook.com/photo.php?fbid=1618356928421838&set=a.1427782410812625.1073741828.100007426390099&type=3&theater