It's purely fanmade
My husband always wanted to see Bolt's mate and even created character's story.
Her name is Thundra and she is TRUE superhero dog with REAL superpowers. Mmmm... That's all I have for her now I guess...
Buuut I think I'll draw her one more time but with Bolt ^_^
Her name is word combination from "Thunder" and "Tundra". It's a hint for her Russian roots )
Here's my humble color sketch ^^ Enjoy)