MJ typically appears with striking red hair
Has she ever had any noticeable changes to her appearance in the last 50-ish years?
Science Fiction & Fantasy Stack Exchange is a question and answer site for science fiction and fantasy enthusiasts. It only takes a minute to sign up.Sign up to join this community
Hitomi Sakuma is Supaidāman's version of Mary Jane.
Mary Jane was portrayed by several actresses in this musical, one of whom, Rebecca Faulkenberry, had brown hair.
There's also a universe where Mary Jane is an anthropomorphic water buffalo, but she retains her red hair.
By mistake in Daredevil #77 (Source)
Mary Jane Watson with blonde hair (and Peter Parker with black hair).
And yes, this issue of Daredevil was published BEFORE Gwen Stacy died. (This issue is cover dated as June 1971. Gwen died two years later in Amazing Spider-Man #121, cover dated June 1973.)
Other than that, the red hair has been a defining characteristic (although it has changed styles many times)....even in other Marvel universes....and when she's been completely transformed into, say, the Demogoblin [Earth-1610]
Well, on Himarm's advice, I am turning my comment as an answer:
In Ultimate Spider-Man vs the Sinister 6 - S4E15 named Symbiote Saga: Part 3, Mary Jane Watson was transformed into Carnage Queen.
Below are the pics on how MJ turned to Carnage Queen:
Also, below is the pic where a mutated Morbius tried to control Carnage Queen by putting a yellow-colored mind-control device on her head:
Mary Jane briefly sported a short, curly hairdo in the late '60s.
I suspect this might've had something to do with the fact that Gwen Stacy had recently altered her hairstyle to more closely resemble MJ's, so this was possibly an attempt to make them look less similar. It didn't stick though, since MJ quickly reverted to her original hairstyle.
When Todd McFarlane took over the pencilling duties on Amazing Spider-Man in the late '80s, he decided to draw MJ with bigger, curlier hair, and this look stuck through to the early and mid '90s, although by the late '90s, she reverted to her original hairstyle again.