What do you call a dog that is pomearian and chihahua mixed?

There isn't a specific breed name for a Pomeranian and Chihuahua mix. You could call it a Pomchi, which is a common, informal name for this mixed breed.

You can also be more descriptive and say:

* Pomeranian-Chihuahua mix

* Chihuahua-Pomeranian mix

* Pom-Chi

Ultimately, it's up to you what you call your adorable mixed-breed pup!