In their January press release, Discovery released a few episodes planned for various shows, including a new pony one coming up on the 26th with the title of "Just For Sidekicks".
Head on down past the break for the synopsis to avoid the usual spoilery things!
Thanks to Kim and everyone else that sent it in!
Episode Number - ???
Title - Just for Sidekicks
Air Date: January 26th
Synopsis: Spike finds himself in over his head after convincing Twilight and her friends to let
him pet-sit all of their critters in exchange for a few gems.