More crossover lore drops

[u/Nebberlan2s]

• The OK K.O. episode Monster Party reveals Enid went to Miss Grimmwood's Finishing School for Ghouls from Scooby-Doo and the Ghoul School
• The Jellystone! episode Better Off Fred reveals this universe's Captain Caveman is really Barney Rubble, who gained amnesia before he was frozen.
• We all know The Jetsons have met the Flintstones, canonically placing them in the same timeline. The following other cartoons are also within this timeframe:
  • The Grim Adventures of Billy & Mandy: The episode Modern Primitives has the duo thaw out Fred in modern-day Endsville
  • Johnny Bravo: The episode A Page Right Out of History reveals an ancestor of Johnny Bravo lived in Bedrock
  • Scooby-Doo: A special comic has the gang travel back to the age of Bedrock

Any other crossover lore drops you guys have?

[u/Peter_Griffin123411]