These two met when they were both in their early 20s, both of them were outcasts in the small town of Ponyville and found themselves drawn to the disco scene that existed there for a brief period. They bumped into each other at one of the nightly discos, during “Kiss” by Prance (that’s the pony version of Prince).  
Cheerilee is part mule on her mothers side. Mules can reproduce in my verse because why not. That’s why she has slightly big ears.  
and then that’s their song Leon..you can read more about him and Zecora in their bios I’ll link them in the bottom..  
I actually don’t have much to say about these they’ve been sitting in my storage for like a month. i might come back and update this with more later