Quote Originally Posted by Chzn8r
The difference between Mecha Ridley and the rest of the Ridleys is not that it's robotic and the others aren't! Ha! Trick question! It's really that Mecha Ridley is the most underwhelming end boss in the history of video games.
Get 100% in Zero Mission, and Mecha's difficulty sky-rockets.

Try it on Hard Mode 100% too.