subs (or maybe everyone) get the ability to mirror any emote just like renaming them. 
#mirroring feature
nimble wyvern
young oracle
This has been suggested before in the form of "emote modifiers"
nimble wyvern
oh okay
young oracle
similar to zero-width/overlay emotes, the modifier would be typed after the emote to mirror it when typed in chat
rather than storing mirrored versions on the server
but that's pretty complicated. Right now, it's easier just to have people reupload flipped emotes. lol
nimble wyvern
yea yea that. i thought of this when i saw that boobamirrored emote lule
young oracle
But your method would probably be easier to program into the site.
Just a feature to create another "alias" with the modifier applied
so every emote could have a flipped variant
coo
young oracle
maybe it'll happen someday
nimble wyvern
young oracle
there are other ideas for emote modifiers, and I think a lot of those would be better if they could be input into chat, rather than an emote having to be created beforehand
like using a "WAYTOO" modifier to apply the "waytoodank" animation to any emote
stuck quiver
I'm assuming by mirror you mean more of like a horizontal flip right
nimble wyvern
yea
i get the chat input thing
but will it be user friendly like if you are looking to add different chat inputs
ill just endup spending like 30 secs typing
maybe im a slow typer
idk
young oracle
well twitch already has emote modifiers when you redeem channel points
like "squished" suffix is "_SQ"
stuck quiver
would be cool to just add a modifier to flip an emote when adding it
Just like an alias
nimble wyvern
thats true
young oracle
3 characters is pretty reasonable to type as well