Autism headcanon: Runt (Animaniacs)
Maybe this is cheating. Maybe this is less of a headcanon than it is canon in all but name, because Runt's voice and verbal tics are based on an explicitly autistic movie character: Dustin Hoffman's character Raymond Babbitt from Rain Man. This is probably why he and Rita were left out of the 2020 Animaniacs reboot, since it's "problematic" to have a goofy cartoon dog caricature an autistic movie character's speech patterns.
Still, I've always liked Runt and I still do. Until I saw someone else point it out, it never occurred to me that his autistic-seeming mannerisms could be offensive. As a person on the spectrum myself, I've always found him relatable.
Here are the reasons why:
*He compulsively repeats sentences and words – especially his favorite word, "definitely."
*He often talks out loud to himself.
*His physical actions can be compulsive too. For example, when someone throws a ball, he has to chase it. Or when he sees a dangling tablecloth, he has to charge at it and tug it with his teeth. And almost every time he hears the word "cat," he goes into a wild, snarling rage, threatening to tear it to pieces... yet never once realizing that his best friend Rita is a cat.
*While he doesn't usually show the savant skills of his Rain Man counterpart, he does show a hint of them now and then. For example, when he points out that a rock pile contains 147 rocks, or when he instantly identifies a dish of fish as Mahi-Mahi.
*He's very literal-minded and doesn't understand sarcasm. This causes headaches for Rita, since he constantly misunderstands her sarcastic remarks.
*He tends to be oblivious to the world around him, and he often doesn't recognize danger or notice when a seemingly friendly person is behaving suspiciously. This is why Rita needs to look out for him. That said, he's not completely clueless, and rises to the occasion whenever Rita or someone else he cares about is threatened.
*His debut episode implies that he's never responded to normal training methods. Despite being an adult dog, he's still not housebroken and still chews things, which is why his owner abandoned him at the pound.
*Despite his sweet nature and devotion to Rita, he sometimes shows an innocent lack of empathy and obliviousness to Rita's discomfort. For example, when he shakes rain water onto her, or eats food that she was about to eat, or doesn't notice when a human is mistreating her as long as he's being treated well. This is all naïve and unintentional, however, and in the rare moments when he realizes he's upset Rita, he's always contrite.
*Sometimes in scary situations, when the obvious thing to do would be to spring into action, he freezes up instead. For example, the first time Rita fights the Nazi dog in "Puttin' on the Blitz," or when Ross Perot almost falls over the waterfall in "Icebreakers." That said, he always comes through and takes action when it matters most – namely whenever Rita is in danger.
*He seems to particularly like music and find it comforting, especially Rita's songs. He can even hear the word "cat" without going into a berserker rage as long as Rita sings it. But then, who wouldn't be soothed by her beautiful voice?