Flipsy

Flipsy is Martin's robot dog which can do flips in the air.

History
After going with his dad to work and making $600 on the stock market, Martin was seen walking down the street with Flipsy. While walking he met up with Bart, Milhouse and Nelson. When the trio learned about Martin's money they decided to use it, and Bart's fake ID, to rent a car and go on a road trip.

As Bart was driving, Martin expressed his excitement about getting to go on a trip with Flipsy. Nelson then grabbed Flipsy and tossed him out the window. Upon landing on the ground, Flipsy was run over by another vehicle.