Best Buddies (Patreon)

I lost track of what the heck is going on in the Equestria Girls universe years ago, but I saw a clip recently of Bulk Biceps slinging his arm over Derpy's shoulders while they walked and laughed together. I'm going to take this to mean Bulk and Derpy are best friends, and have been since the dawn of time. It's canon, sorry, I don't make the rules!

Naturally, when each end up with unplanned foals rather young into their adult lives, they vow to have each other's backs in this stressful and uncertain time. Both Derpy and Bulk were heavily bullied growing up to to their clumsiness and perceived mental shortcomings. Both Derpy and Bulk are reasonably intelligent and capable, their brains are simply wired different, and they struggle a bit with forgetfulness, difficulty focusing, and not often being able to see the "obvious" solution to a problem. (Like this guy!) They work best with ponies willing to extend them a bit of patience, which unfortunately can be in short supply in Ponyville.

Because both ponies knew how awful it was to be presumed as stupid, they vowed to raise lil Featherweight and Dinky with utmost love and patience, and raise them in close proximity, so the foals could have a lifelong friend in each other.