While Doctor Whooves was somewhat stranded in Equestria, the TARDIS reverted to a form suitable for the pony realm and began to look for him. After a few years, she gave up and started living in Canterlot as an inventor and engineer. She soon hard that the Doctor was in Canterlot and began searching through the rather large city. She deduced that if she could fly, she could search more thoroughly, so she created and installed (a rather painful process, might i add) mechanical wings. Learning to fly, however, was a different story. She crashed into a Pegasus Stallion by the name of Solarflare who made her question whether time travel was worth it. (Basically she fell for him… literally and figuratively.)