Beavis and Butt-head
Beavis and Butt-head was a classic animated series created by Mike Judge for MTV that aired from March 8, 1993, to November 28, 1997, right in the middle of Chris's childhood. Chris seems to have been a fan of the show, having plagirparodied a scene from the show, in Sonichu 7.
Background
The show revolved around the pathetic lives of its unfortunately named titular characters, a pair of fifteen-year-old idiots. When the boys aren't slacking off and watching TV, they often wander around their small hometown, concocting ridiculous get-rich-quick schemes or trying to lose their virginity. In other words, they would remind one of Chris, only younger, employed and without the video game obsession. Also, at least Beavis and Butt-head have each other. However, comparing Beavis and Butthead to Chris is an utter insult towards them for the fact that even their lives aren't as pathetic than Chris.
Chris and The Show
Around the time the show was airing, Chris was 11-15 years old, which for the most part was the crowd that watched the show around that time, so it is very possible that Chris watched the show at the time, and was a fan of it.
Perhaps Chris was able to identify with two idiot slobs who simply enjoyed sitting on their couch, watching TV and were socially backwards. Or perhaps these two characters served a huge part in the shaping of Chris' lifestyle. With his simplistic mind, perhaps he found enjoyment in watching these two simple characters being lazy and doing idiotic things, yet finding themselves in all kinds of amusing and entertaining situations. However, as it is already established that Chris can't project himself in other people's shoes or see things from other people's perspectives, Chris was only able to find the antics of these characters to be entertaining and fun from his view as a viewer of the show, and thus he identified these situations themselves to be fun and entertaining, and that made him wish to be in these types of situations himself. You see, Chris obviously sees television (and fantasy worlds in general) and real life as interchangeable (or rather THE SAME) he probably wishes his own life to be just like the TV shows, since he could identify certain positive emotions with situations in a TV show, so he wants to experience these types of situations in his own life, thinking that will bring out the same positive emotions, failing to understand that viewing situations, scripted out on television, is not even remotely the same as actually experiencing similar situations. So since he sees that two slobs who do nothing and just act like idiots can get into fun and entertaining emotions, he figures that if he acts the same way, he might find himself in similarly fun and entertaining situations. So perhaps this caused him to subconsciously shape his own habits and lifestyle to be similar to these two characters.
Then again, maybe he just had too much money to spend, heard that the show was funny as shit, bought some DVDs and thought the show was funny, by taking the simplest jokes at face value.
In The Comics
Whatever Chris' reasons for having seen the show were, apparently he thought that a scene from this episode of Beavis and Butthead fucking around with a locker was so funny that he decided to steal parody it in Sonichu 7. The point of the cameo was to mock Chris's memories of creating Bionic the Hedgehog in 1996. Chris recalls Bionic emerging from a locker in his imagination, so this leads him to the "hilarious" idea of having Beavis and Butt-head slam the empty locker shut, just like in their own show.