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

[The Orca]

One of the characters from Precure.

 

[Nellie Rose Morningstar]

A whale hehehe

 

[Nic]

It's Waluigi! Though I can't pinpoint the source of the art.

 

[Princess Viola]

An 8-ball

 

[Nyorori]

80's or 90's anime football player with an awesome flag in the background

 

[Zdrmonster Productions]

Anime girl cosplaying as Optimums Prime

 

[Princess Viola]

Bubblun

 

[Zatanna]

An animated character wearing an American football sports gear (with shirt number 28) posing on a background which is a diagonal striped variant of the nonbinary (enby) flag. I don't know who the character is though.

 

[Will Solace]

Green Lantern from DC Super Hero Girls, I don't plan to see the show but it's a cute design.

 

[Zdrmonster Productions]

Blonde-haired guy

 

[Princess Viola]

Bubblun

 

[Boo1268]

Bubblun

An animated character wearing an American football sports gear (with shirt number 28) posing on a background which is a diagonal striped variant of the nonbinary (enby) flag. I don't know who the character is though.

 

[Nyorori]

A Silent Killer

 

[Princess Viola]

Presumably it's Nyorori.

 

[The Orca]

Precure character playing football

 

[Zdrmonster Productions]

SA1 Orca?

 

[Princess Viola]

Bubblun

 

[Bowser Jr.]

Nonbinary anime girl football player.

 

[Zdrmonster Productions]

King Koopa's son who made fake slimy Yoshis

 

[Guinea]

Bubble Bobble

 

[Bowser Jr.]

I think it's Link getting chased by a Chain Chomp which I think is a reference to Link's Awakening specifically because those were in the dream world Link was in (the whole experience turns out to have been a dream at the end). I also remember there were Goombas from Mario, too.