Any headcanons for how the Doug cast interact with other Nicktoons? I can see Doug's parents not liking the Turner parents [Fairly Oddparents] or the Loud Parents [The Loud House] for obvious reasons, and I can see Doug getting along well with Arnold from Hey Arnold.
-Because Doug and his castmates are more down to earth and grounded, they have trouble getting along with some of the more....off the wall Toons like Ren and Stimpy, Fanboy and Chum Chum, and the Breadwinners cast.
-Doug considers Ickis (from AHH! Real Monsters) to be one of his best friends. It helps that both have similar shy and daydreamer tendencies.
-Patti REALLY gets along well with Ginger, considering Ginger to be one of her best friends. Meanwhile Roger gets along well with Dagget and Norbert from Angry Beavers.
-Skeeter gets on well with some of the more obscure Nicktoons, like the X's and Robot from Robot and Monster. He's generally interested in the more obscure Nicktoons as a whole and often goes out of his way to interact with them.
-Doug is a go-to guardian for the Rugrats whenever they're in their "baby forms" (they switch between their baby forms and their teen forms depending on what mood they're in for the day. They do this constantly). The Rugrats absolutely ADORE Doug because he tells some of the best stories. They often ask him to include them in his tales of Quailman.