With American Dragon: Jake Long, as both works involve 13-year-old protagonists of Asian heritage in the early 2000s, whose maternal family bloodline is blessed with the ability to transform into mystical animal beings. Both even have red as their Color Motif (in clothing and forms). Fans of both works have pointed out the similarities between the two and have drawn some fanart and fics of them together. Disney Heroes: Battle Mode even puts Jake and Meilin together in a story campaign, almost making this Ascended Fanon.
With Baymax! as the third episode has the subject about a girl getting her first period just like the film serves as a metaphor about getting a period. There's even a scene of Baymax getting tampons just like how Ming has pads ready for her daughter.
Brother Bear fans are likely to be on board as both series have protagonists who gain the ability to transform into caniforms and learn to like their new forms with their families also learning to appreciate them too. Both Kenai and Mei also decide to keep their transformations, with Mei doing so while retaining her human form as standard. Bonus points for both films being set in North America.
A minor one with Centaurworld because of Mei's drawings of Devon as a merman, due to the "hot mermen" magazine from Centaurworld that got similar memetic attention.
With Derry Girls, as both feature a group of teen girls (and one boy), who look and behave like actual, realistic teenagers.note Derry Girls even features an episode about the girls desperately attempting to attend a pop concert but running into trouble due to a bear.
Encanto fans also like to include Mirabel in the mix. The relation between the two grew stronger when it was revealed that one of the themes was generational trauma, with Mei Lee calling out her mom for her high expectations and emotionally supporting her after learning of her past trauma, just like Mirabel did with Abuela Alma.
With Kung Fu Panda potentially, due to the shared theme of anthropomorphic animals with prodigious strength, agility and mystical abilities. Both stories also have protagonists who pursue their dreams against all doubts. Kung Fu Panda even features a small, red panda master as a major character.
With Luca, as both films involve young protagonists who can shapeshift and have to hide their non-human forms among humans. This often leads to fan works of Mei meeting Luca and Alberto, regardless of the disparate time periods.
There's overlap with the fandom for The Owl House due to both works being Disney properties with a non-white teen girl protagonist, diverse casts, and characters who transform into large versions of normally small animals. The episode Keeping Up A-fear-ances in particular contains multiple parallels with a character having a rocky relationship with her mother, and the mother apologizing at the end.
Surprisingly, with ParaNorman fans as well. Not only because both Norman and Mei deal with something they consider a "curse" (Norman his ability to see and talk with ghosts and Mei her panda transformation), but both must face down disapproving parents (their father and mother respectively), and said "curses" are vital in their respective climaxes, which ultimately end with going into the spirit realm to calm down the antagonist. Mei meets the younger form of her mother in the spirit realm and helps her come to terms with herself, similar to how Norman talked down Agatha.
Similar to The Princess and the Frog, the protagonist has to contend with an animal transformation that they learn to use as an advantage. Both animal forms also factor into the defeat of an "antagonist" element in the story.
With Ruby Gillman, Teenage Kraken as both movies are a coming of age story with girls being humans (or apparent humans) transforming into monsters and a major battle with a giant monsternote concept art shows that the fight between Mei and Ming was originally planned to have both of them be kaiju-sized, one featuring Mei's mother and the other featuring Ruby Gillman's Alpha Bitch rival antagonist. They both even hit similar plot points like Mei and Ruby both fighting with their mothers to go to a "dance" of sorts and their mothers keep their transformation a secret which ends up backfiring when it happens inadvertently. One of the running gags is for the Gillmans' outward weirdness being attributed to being "Canadian", helping to strengthen a connection between the two films.
Received some fandom overlap with Tokyo Mew Mew due to both main protagonists having the ability to sprout the ears and tails of their respective animals, being able to transform into said animal (albiet in reverse and moreso unwittingly in Ichigo's case) and being set during the early 2000s. In addition, fans of both works have noted that Mei would immensely relate to Ichigo regarding her initial situation of keeping their animal sides a secret from their loved ones and Turning Red premiered in the same year as the reboot series, Tokyo Mew Mew New.
