"Pop Guy" originally known as the "Ba Ba Ba Guy" is the nickname of a character in The First Guy To Ever Be A Toxic Fan portrayed by Ryan George. He is possibly referenced in The First Guy To Ever Make A Commercial with the character Frederick Noisemaker; the host of the show All The Noises I Know How To Make.
The "Pop Guy" is an individual who while standing in a field made the sound "Bap Bap Bap"; another unidentified individual liked the sound and became a fan of his work wearing a shirt which says "Ba Ba Ba Guy" on it.
He then makes a "pop" sound with the toxic fan saying he liked his original work but later becoming a fan of the new "pop" sound even changing his shirt to say "Pop Guy" on it.
In The Scary News Network, it was said that people rumoured that he was saying that the Scary News Network profits off of keeping their viewers scared and hopeless through sensationalist headlines. After this was rumoured, Brett Newscaster, Peter and Gerald, being all demons, made him spontaneously combust, killing him.