"you don't use an anime to describe a kids show"
Wassup, another unhappy brony in his/her marshmallow world hating anime? MLP FIM owes a lot to the anime...they basically ripped all the cuteness, eyes, etc from there...so I can compare them if i want to...
2 facts: EG versions CAN'T go through the portal (EG Pinkie just put her head in as a gag joke for her breaking the 4th wall power...), as the sirens stated in the beggining of the movie, there is ABSOLUTELY NO MAGIC in EG world. No magic, no travelling, even with Equestria Sunset powers it's a two-side ticket only for her and HER (latter Twilight and even the others could also but we are talking about the future and about Equestria beings!) About Sunset not having a copy, no, it was clearly stated ALL PONIES and some other creatures (like the diamond dogs) have their parallel version, NO EXCEPTIONS, this is one of the few things *very* specified in the movies, and probed to be correct when we finally see the Twilight EG missing version at the end of the second movie. So the "dark" theory about Sunset still stands (unless she keeps captive her EG version in some basement or abandoned warehouse Spiderman style but now she is "reformed" i highly doubt it...)