It mentions how a lightner made his NEO body

And it's similar to Mad MewMew (A skirt, the pink)

we know that Mad Dummy or perhaps Mad MewMew (we never see them, only see them talk, so we can't know which one) is in the real world, so they're a lightner

And you could argue that it looks more like Mettaton, which it does, plus the yellow heart thing

but

We know that Mettaton lives with Mad Dummy based on them both talking

so he may have gotten inspired by how Mettaton looks

plus, he has no Mettaton leitmotifs in BIG SHOT

he has a rip from Mad Dummy though

plus we see a dummy of Spamton in the game, and of no other character

I could be looking too deep into this

but