Iron Lisa and Dr. Bartopus pt7

So, here's a new story of mine. This is also a Simpsons superhero story, but now I use unoffical characters instead of Clobber Girl and Stretch Dude. The heroes of this story are Iron Lisa (Lisa Simpson) and Doctor Bartopus (Bart Simpson).

Iron Lisa belongs to
Original artwork of Iron Lisa here: [link]

Doctor Bartopus is my own creation.