Yes, that’s exactly what you think it is. A Transformer. That transforms into the TARDIS.
This masterpiece of pop culture is the work of [Nonnef] over on Instructables. After the inspiration to create this work of art struck, [Nonnef] started modeling this Transformer and TARDIS in clay to make everything fit together just right. After a good bit of 3D modelling, the Doctor’s robotic wife was ready for printing.
If you’re going to print one of these for yourself, be prepared for a very long print. [Nonnef] says the latest version took about 30 hours on his RepRap with a .35 mm nozzle. In the end nearly the entire Transformer came directly from a 3D printer, the only additional parts needed being a pen spring and a small screw. Paint is, of course, optional.
All the files are available on the Instructable.