@Darth Sonic  
War Machine and Falcon weren’t Avengers until after Ultron, and they sort of stepped in to replenish numbers after Tony’s retirement and the disappearances of Thor and Hulk. Granted I might be knit-picking here about same-time-membership.
 
Sci-Twi works better in the sense that she was new to magic by the time she was already super skilled at science, but they’re still two expressions of the same core character. Considering the concept is already presumably creating yet another expression of said character, it seems kind of silly to differentiate.

@Background Pony #A07F  
Because he isn’t an Avenger.
 
Sides which, Sci-Twi is a better Doctor Strange.

@Background Pony #04C7  
Spike doesn’t really struggle with greed though. He just isn’t the greedy sort. He got greedy once, but since then he’s pretty cool dood.
 
What I don’t get is why Twilight isn’t Doctor Strange.

@Swashbucklist  
Yes I know there are some, which is why I said usually.

@Background Pony #04C7  
There are already Avengers pics featuring Spike in Hulk’s role.

I don’t know why it bothers me, it shouldn’t bother me, and yet it still does.  
Why isn’t Spike usually the Hulk in Pony Avenger pics?  
He has basically the same exact ability, just based on a different emotion. The small, harmless guy who struggles to keep his rage greed in check or he turns into a uncontrollable monster version oh himself.
 
I guess it bothers me because it makes me feel that even when there’s a character that fits him so well in parody, people still use one of the Mane6 instead, and give him a less prominent role even if fits him less than the other one.  
I know most people don’t do it because of that, but it still makes me sad.

Stan Lee: “I’ve got a package for…Twilit Sporkle?”
 
Twilight: [frown]
 
Spike: “Ohhhh, man. Hahahaha! Yes, this is Twilit Sporkle!”

Great image!!

OMG! Yes! Rainbow Dash as Falcon! Best idea!