Despite being major characters who give directions to the main characters so they could return home, Marcel and Paddy from Alpha and Omega are not really that popular with the fandom. Go ahead and check out any fanbase on Deviantart or Youtube, you'll be surprised that those two have barely to any mention with the rest of the characters, a majority being wolf fans.
To many fans, Gurgi of The Black Cauldron is in the same boat as the gargoyles below, being the Plucky Comic Relief in a movie that's mostly held up for its darker aspects. The only problem: The gargoyles were at least kinda funny, while Gurgi kinda isn't. The voice doesn't help, either. About half the movie's fans thinking he's a Scrappy forgive him a little for his actions in the climax; the other half wish Taran had asked for the sword back. That being said, Gurgi is one of the Scrappies who are most subject to YMMV effects: at the movie's release, numerous critics said he was the most endearing character of the picture.
Buck, Chicken Little's father, is considered to be one of the biggest complaint in the film due to him being an assholish and neglectful father to his own son, only supporting him when it is in his own best interests.
The townspeople also count for the same reasons, relentlessly hounding a child for an innocent mistake and going out of their way to reinforce the outcast he has become for it, only laying off when Chicken Little does something to boost their own selfish desires.
Though Delgo as a whole is a Scrappy Movie, the comic relief is generally the most hated character, being seen as an even more annoying Jar Jar. Allow YouTube to demonstrate.
Not many people still fully and non-ironically like the Minions from Despicable Me. Many have felt that their charm has worn off, and see them now as annoying and over-hyped bit characters. It really doesn't help that many people feel that they steal the spotlight from Gru and all the other main characters and even got their very own movie.
Whitey is disliked because his voice just comes off as downright ear-grating to several viewers. However, he is also a very interesting case since even people who don't like him actually still find it easy to sympathize with him, mostly due to what Davey puts him through.
Davey (the main character) is probably even more disliked than Whitey because he just comes off as an incredibly unlikable and mean-spirited Jerkass whom constantly mistreats Whitey, terrorizes innocent citizens, and is just thoroughly unpleasant in general. Even when the writers attempted to give him a backstory that his parents died in a car crash on the way to his basketball game during the Hanukkah season at around 12 years old, he still comes off as too damn unlikable to be sympathetic at all, and while he does eventually learn to be a better person at the end, his lack of consequences and the way he takes his anger out on people just makes him too much of a bully to relate to or find likable in any way.
While none of the characters in The Emoji Movie were really considered to be very interesting characters in the first place, the local comic relief character Hi-5 the High Five emoji is often singled out by critics as one of the worst characters in the movie, thanks to his character failing to actually be funny most of the time, adding nothing new to the table as far as comic relief characters go, and being completely useless most of the time. It doesn't help that the main characters go out of their way to rescue him when he faces certain doom, but not the more sympathetic character he was trapped with.
One would have a difficult time finding someone who likes Nozemkemph (The "wild breed" cat) from Felidae. Fans were not thrilled that Francis ended up choosing her as his mate and not Felicity, ignoring the fact that one, Felicity is murdered not too long after Francis meets her and, two, cats aren't known for romance. It doesn't help that Nozemkemph is never mentioned by name in the movie, only appears for a brief time to provide some exposistion, has sex with Francis, and then just leaves until showing up at the end of the film.
While several characters have their share of fans, including Bluebeard and Pascal AKA Claudandus, Kong's lackeys "Hermann" and "Hermann" (Or Herman 1 and Herman 2) are often overlooked by the fandom due to their lack of plot significance or any real distinctive personality.
While Sid has his faults, he at least contributes to the plot and gives a few laughs. Crash and Eddie don't. Those Two Guys are annoying, and if you remove them from the third and fourth film, the story will be completely the same. Even in the second they are not very useful, as all they do is making Ellie, a mammoth, believe she's a possum (whether because they are stupid, or because they want to keep her as a sister, which is no better). They are reduced to background characters in the fourth film, and appear only to give some gags.
Shira from the fourth movie, much like Lola Bunny, is a boring "tough girl" clone of one of the main characters who only exists to serve as a love interest. Not only that, her pretty white fur and flawless face sticks out like a sore thumb amongst the more ugly pirates (which also makes it painfully obvious, even to the target audience, which one will pull a Heel–Face Turn), with the only part of her that's even remotely asymmetric being that she only has earrings on one ear.
Teenaged Peaches in the 4th movie also gets this for her plot of that movie being pretty much a cut and paste of a million teen sitcom cliches.
In the movie adaptation of The Lorax, Aloysius O'Hare is not well-liked, especially by fans of the book. This is mainly because he has no reason to exist other than to give us someone to root against and to make The Once-ler look better by comparison. He may have been better received if he had any charisma, but he doesn't. At all.
Mushu in Mulan II; all the traits that made him likable in the first film are gone in favor of this selfish, spiteful, and downright unpleasant character. He tries to break up Mulan and Shang because if they wed, it would rid him of his guardianship, and pretty much succeeds until his guilt gets the better of him, knowingly and happily committing said atrocities. Even though he does the right thing by the end, it's still not enough to salvage him as he still gets to keep his job due to a loophole, thus not only making that aesop he learned pointless, but also proved that there was no conflict to begin with and that all of Mushu's actions could have been easily avoided.
Elliot, the one-antlered mule deer from Open Season, is basically an Expy of Sid above. Not only is he extremely annoying and unintelligent, he was also responsible for coaxing Boog into a drunken eating binge throughout the town and sabotaging one of his nature shows by panicking the audience when they thought Boog was gorily dismembering the deer through a curtain covered Shadow Discretion Shot, leading his owner to tearfully relocate him in the middle of the forest hundreds of miles away. Even though he's been living in the forest his entire life, Elliot's attempts to get him back home results in complete disaster for Boog and those around him. Even the leader of Eliot's former herd, Ian, seemed to have the right idea to banish him despite being a Jerk Jock. Fortunately, unlike Sid, he undergoes a personality change in the second movie when trying to marry his sweetheart, Gizelle, becoming somewhat less annoying and more reliable, which may have rescued him for some.
Meeko, for being an annoying JerkassDesignated Hero who tortures Percy for no apparent reason. Meeko, Percy and Flit in general are big base-breaker: some things they're scrappy token Cute Critters who ruin the movie's serious mood in a manner similar to The Hunchback of Notre Dame's aforementioned gargoyles; others think they're comedy gold.
Ratcliffe is Rescued from the Scrappy Heap for some in the DTV sequel due to being a more competent threat there as opposed to just a greedy buffoon.
John Rolfe from the sequel for coming between John Smith and Pocahontas. Historically, Rolfe did marry Pocahontas, but fans of the Disney version think she belongs with Smith. In fact, the Smithahontas were so angry, Disney kept releasing merchandise reaffirming Smith and Pocahontas as a couple in spite of the sequel (which said hating fans have jumped upon the opportunity to interpret as a sign of Canon Discontinuity).
In Don Bluth's Rock-A-Doodle, there's Edmund. Most people dislike him, probably due to his voice and lisp. Made even worse by the fact he's a friend of the lead character, Chanticleer.
Snow White gets picked on by some people due to tasting like diabetes and being Too Dumb to Live. She's also frequently cited by anti-rotoscoping attitudes as a prominent example of the Uncanny Valley, compared to her costars who were much more cartoony and stole the movie for many people. Disney probably toned down the realism of future animated characters for that very reason.
All of the new characters created for Tom and Jerry: The Movie are scrappies, Pugsy, Frankie, Aunt Figg, Lickboot, Captain Kiddie, Squawk, Dr. Applecheeks...and especially Robyn Starling, the girl that Tom and Jerry help to find her lost father, and the one responsible for making Tom and Jerry stay Out of Focus and making the movie being about Tom & Jerry In-Name-Only. The few that aren't universally reviled (Lickboot, Applecheeks to name a few) are only liked because of YouTube Poopremixes and memes.
Pugsy deserves a special mention, as he is the one who got Tom and Jerry to talk and sing about how they are best friends, despite Tom and Jerry being, you know, mortal enemies...sometimes. Really, Tom and Jerry's actual relationship is very difficult to define, with them being enemies one minute and allies the next, and their reason for battling likewise being very difficult to define. Still, Tom and Jerry aren't supposed to talk all that often.