He probably wanted to redeem himself by being the one who brought down Doctor Octopus.

The entire side wall of the building shattered behind him as Doctor Octopus followed close in pursuit.

Doctor Octopus moved deeper into the building, smashing down walls as he went.

Nor could he make himself believe that this was the last he'd see of Doctor Octopus.

However she is seized by Doctor Octopus, who covers her mouth.

Doctor Octopus reveals himself as the mastermind of the cloning experiments.

Doctor Octopus got up from behind the desk and slowly crossed the bare room to where the curtains hung down.

Doctor Octopus later appeared in a new robot suit which would help to keep him alive.

Doctor Octopus appears on the monitor, claiming victory as the last of his satellites had already been built and launched.

Lizard then goes to look for Doctor Octopus to find more of the serum.