The Loud House

The Loud House is about a boy named Lincoln Loud as he lives with the rest of his ten sisters in one house that, while archetypes at first, gain developed personalities as the seasons continue. See a family develop in real-time, along with having them age by one year by the time season five arrived.

Crossover?
The Loud House gained a spin-off in the form of The Casagrandes, featuring Ronnie Anne Santiago.

The many cross-series easter eggs in the episode Linc or Swim, which includes Lou Pickles, Grandpa Phil, and Ms. Fowl don't mean anything nor is it indicative of a crossover. Not only is it illogical for most of them to be in a public pool in Michigan (the state that The Loud House mostly takes place in), Iroh from Avatar: The Last Airbender is also part of the seniors.

Iroh lives on an Earth that is geographically different enough to not contain a version of the United States of America, nor would it make sense for a retired Fire Nation general to be swimming in the state of Michigan. According to Book 2 of The Legend of Korra, sometime after 131 AG, Iroh chose to ascent to the Spirit World, which we can confidently confirm is not Michigan nor would it become Michigan come the 21st century.

Links

 * Lincoln Loud - Jumping-off article
 * Timeline -