What happens when the Reds and Blues finally get Church out of the Epsilon unit? Caboose decides he wants a turn in the unit, of course! What happens next? Well let's just say he always did say he wanted a pony, now he has a world full of them.
The "My New Life In Equestria" trilogy concludes with the chronicles of Matt and Applejack raising their Daughter from foalhood to her teenage years. Hilarity ensues. Sort of.