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

[Anglefish]

I've never seen that character before. In my opinion she looks like a cool wrestler from the 1980s. I'm sorry I don't know!

 

[TheBlueCatMenace]

Derpy Hooves

 

[The Koopa Eating Dragon]

A blue cat

 

[Nate Jacobs]

Hooktail from Paper Mario: The Thousand Year Door. I watched a Let's Play of that game all the way back in 2012

 

[FizzletheMovieTheater]

A dude from a 3DS game. I read it somewhere

 

[Doctor Welfare]

A character called GB from some sort of Mario Land 2-themed fangame or fanfiction

 

[Pink Cat]

Manny-O

 

[Princess Viola]

Drago, I presume

 

[Larry "Cheatsy" Koopa]

Some anime girl with green hair? I don't know; the animation style looks like something anime.

 

[Power Flotzo]

The youngest Koopaling.

 

[Princess Viola]

A character from one of those idol gacha games like Bandoori, Love Live, etc.

 

[Doctor Welfare]

An anime girl, looks like it's 1980s, also looks kind of futuristic/spacey

 

[TheBlueCatMenace]

The Mammoth from Mario Odyssey art book

 

[Lady]

A blue cat that is staring deep into my soul (help)

 

[Princess Viola]

Lady Bow

 

[FizzletheMovieTheater]

Someone, from somewhere, doing something (in layman's terms, I've not an idea)

 

[Lady]

TCNick3 It's a Piplup, right?

 

[Pink Cat]

Pomni I suppose

 

[Anglefish]

Master Viper from the Kung Fu Panda franchise! Although this image of her looks to be a plushie.

 

[Princess Viola]

A character from a mediocre cartoon with a fandom that seriously died out outside of the hardcore fanbase quickly.

 

[The Koopa Eating Dragon]

Miriya Sterling

 

[Pink Cat]

Hooktail

 

[Doctor Welfare]

Dragon Ball Z Man (I can tell because all characters from dragon ball have the same chronic disorder causing malformed faces/flashy colors)
(i am a doctor so I would know)

 

[Lady]

Some doctor holding a pill thingy container.

By the way, every heard about Dr. Amigo?

 

[Princess Viola]

Princess Peach