AAAAAAAAA (AKA The Fonz) is a Nidoking that appeared as one of RED's primary Pokémon in Twitch Plays Pokémon Red Version. His nickname, The Fonz, is a reference to the character of the same name from the show "Happy Days". In the show, whenever "The Fonz" would enter the scene, he would say "Aayyyyyy", and because the Nidoking was nicknamed AAAAAAAAA, the Hive Mind related it to The Fonz's catchphrase.
During the 9th day of Twitch Plays Pokémon Red Version, on one of RED's Safari Zone catching sprees, he managed to catch several Pokémon species, one of which being a Nidorino. At the time, the Hive Mind only thought of the Nidorino as another irrelevant catch.
The events of Bloody Sunday occurred a 3 days later, 12 Pokémon were released, Nidorino was one of the many Pokémon that survived the event. Because some of the semi-decent Pokémon were released, Nidorino was forced into the role of being one of RED's party Pokémon. Over time, Nidorino grew increasingly stronger, eventually evolving into a Nidoking after receiving a Moon Stone.