Do you know what the above user's avatar is?

[peachie]

Princess Peach

I-It's Peachette, not Peach.
Anyways, Milia Fallyna Jenius.

 

[Sweet Snow]

Cheer and Grumpy

 

[Thomas the Tank Engine]

Cell

 

[MegaBowser64]

Dragon quest character? I know I've seen her somewhere but I'm not sure where

 

[Zdrmonster Productions]

A random doctor.

 

[Sweet Snow]

Bub

 

[MegaBowser64]

Kit Cat

 

[Rick the Door Technician]

A totally normal non suspicious doctor.

 

[Sweet Snow]

Blue so blue

 

[Thomas the Tank Engine]

A Toadstool girl

 

[peachie]

Lynn Minmay

 

[Botted_Account]

O d i e

 

[MegaBowser64]

Cyan from Show By Rock

 

[Fizzle]

A Koopa who went to Doctor School

 

[SparksMarioWiki]

The Phantom in his classic opera look. Artwork looks to be from Mario + Rabbids Kingdom Battle.

(accidentally posted in the wrong thread. Oops!)

 

[Sweet Snow]

Muffin Button

 

["Scary" Wolf]

Meowkie

 

[Rick the Door Technician]

The ghost from Pmttyd.
(Ha I bet no one will guess my avatar it's not like it's written in the subtitle or something)

 

[Fizzle]

Hmmm.. I don't know... Perhaps Sheev "The Senate" Palpatine?

 

["Scary" Wolf]

SM64 Mario with a loopy face.

 

[Smg4]

Blue fire with eyes

 

[theDLCguy]

Hell valley sky trees from Mario Galaxy (you made a user post about it).

 

[Smg4]

a green pig

 

[Rick the Door Technician]

Those creepy dudes from mario AKA H***ValleySkyTrees

 

[Smg4]

A man with a mask made from a bag