A neat piece of fan art joins The Simpsons and the Nickelodeon show Aaahh!!! Real Monsters. While The Simpsons has been a television staple of the last 30 years, Aaahh!!! Real Monsters had a more modest run, airing from 1994-'97. Still, the series was a hit with critics when it was on, and many of its fans, now in their 30s and 40s, consider it a classic. It helps that the premise for Aaahh!!! Real Monsters was simple yet inventive, following three monsters—Ickis, Oblina, and Krumm—at a school run by headmaster The Gromble.
https://screenrant.com/simpsons-aaahh-real-monsters-nickelodeon-crossover-art/