Second Chance: Plumbinator

PLUMBINATOR

My answer is . . . 

YES

I don't know why I said no before. Like, obviously, Bunsen and the Plumbinator can take on the same moveset. It's not like she had an echo. On the other hand, it would have worked fine as a Robo Koopa echo too. I'm dumb, okay. I'm dumb.

Here's the moveset I came up with:

Standard B: Eggs

Could stick with the drill, but throwing eggs as a projectile is more directly connected to the Plumbinator.

Side B: Extend-o-Arm

Not something it was shown to have, but it did have those plunger arms, which could make it distinct from Bunsen.

Up B: Rockets

Same as Bunsen and Robo Koopa.

Down B: Flyswatter

Naturally.

Final Smash: Robo Battle

Plumbinator and Robo Koopa will grow gigantic and battle across the stage, doing lots of damage in the process.

Entrance: Mario and Luigi will power up into it.

Taunts: Up, Mario and Luigi will raise their plungers into the air. Side, they will stumble back and forth, Luigi losing his balance. Down, Luigi will produce a pair of scissors and snip them.

Kirby Hat: Mario's head gear.

Kart: Basically a two-seater car based on the armor.

Special Move: The car will break apart and be able to drive separately, with Mario and Luigi driving each.

Spirit Battle: A giant battle on Wily Castle, with Bunsen.

Victory Screen: The two brothers will stand triumphant over Robo Koopa's parts.

Losing Screen: Mario and Luigi will sit up from rubble matching their suit's rubble in the cartoon.

Color Swaps: The standard appearance, Mario's colors swapped for Luigi's colors, Peach's colors, Daisy's colors, Wario's colors, Waluigi's colors, Donkey Kong's colors, and Bowser's colors.

Thanks for reading! Next up is a twice-appearing character from the live action segments.