Right now, the Mamba is failing at cheating. Which is also why he's not offering encouragement or an answer. Not that he usually offers good answers.
The A.A. has no intentions on interfering. One would think they would be concerned with scales popping out of the Mamba's face, but apparently not.

A cotton ball just poked out from her costume.
Yay? Is it okay to say yay in this type of circumstance? When the reason is that no one suffocates on a Halloween thread? When someone's cheating to cause results for someone else and will probably cause misconceptions for that 'someone else'? When at least it's a cotton ball and not something worse, and is attached to her clothing rather than her flesh?

The Mamba nods because he's out of breath. Wow, he sucks at this type of magic.

"Ball," the Mamba states before he just half-collapses onto the nearest wall.
The narrator swears, he's more athletic than he seems.

The Mamba nods and then continues collapsing onto the wall while his very considerate friends either continue being preoccupied being excited over a cotton ball or continue ignoring him outright. What beautiful friendships.

Whee.
Lol, now to wait for the next October 31st...

It hasn't fallen off 'cause it's stuck to her costume. It's not even a cotton ball, really. More like half of one. The other half doesn't really exist, seeing as...it would logically have been in her costume, but it's not. So yeah.

It's regular old cotton, but if she keeps poking at it, it's going to wear and fall apart. Lower quality, one would suppose.

"But cheetahs aren't white," the Mamba manages to point out. "And doing that this way's gonna be too hard."

"So you don't wanna be white," the Mamba evaluates, or whatever.

"But you can't," he points out. "You can't magic."
R.I.P.

R.I.P. the Mamba being both bad at socializing and remembering his lies is what the actual R.I.P. means, by the way.
"You'll probably die before that," he evaluates. "And cheetahs aren't that poofy."

"Oh yeah, you can't die with your mask on," the Mamba realizes aloud, stretching out the "Oh yeah," before tilting his head and saying with a deadpan tone of voice, "Which you don't have right now."

Temporarily, the A.A. states telepathically, perhaps uncharacteristically reassuring, intentional or not.
They could advise her to be more vigilant and careful in the future, but they don't. Whether they just don't care to or see that as something she should know is unknown.

Why is it that whenever the A.A. finally says something slightly more emotionally understanding, it's always used as ammo in some useless debate? One of the many unanswered questions of the world.
Also, when "See?!" is used, the Mamba doesn't back down. Oh boy. "Cheetahs still aren't poofy, though!" he exclaims. "They're furry and can be made into blankets and roasted meat, but they aren't poofy. Pillows are poofy, and cheetahs can't turn into pillows."