Liquidator devising the group name, the Friendly Four, in about two seconds.
And Negaduck's reaction to the name. It includes ranting loudly and throwing random objects (including multiple kitchen sinks) while searching for a flamethrower.
"Friendly Four! Friendly Four! They couldn't have picked up a worse name if they had asked the Cute Little Lost Bunnies themselves! And these are my arch rivals! I'm embarrassed to even be called their enemy!"
Voice: "Forgive me if I don't believe that three mutants and an insane asylum refugee are heroes."
Bushroot: "You should talk! You're a disembodied voice with a creepy laugh! And guns! Why do you have guns! You could hurt someone with those!"
Voice: "That's the entire point of having a gun."
The fact that most common of the super villain plots they deal with are "I Have a Death Ray" plans, "Take Over The World By Collecting a Resource" plan, and "Let's Make a Shrink Ray" plans. This annoys Megavolt more than anything.
Dr. Slug mentioned the fertilizer he's been working on having an "interesting" result.
Megavolt: "Define 'interesting.' Interesting as in 'huh, that's funny', or 'Oh my god it's an abomination unto man and nature'? Because that's a very important difference in 'interesting'."
Megavolt is quite aware that he's pretty much crazy to be living the lifestyle that he is. He even spells out how he's bad it is
"And some-how, Megavolt had no idea how; he had ended up becoming best friends with the one single person in the entire universe who was a bigger lunatic than himself!"