Beware the Nice Ones: After dealing with Cera's attitude for a while and then her remark about his mother being stupid, Littlefoot snaps. He lost the fight, but it was a pretty brutal affair.
It's Personal/You Killed My Mother: Not outright stated, but when the opportunity to kill Sharptooth appears, Littlefoot is the first to take it.
The Stoic: If something's going wrong, Littlefoot's generally the one who keeps his head together.
What the Hell, Hero?: In Invasion of the Tinysauruses, Littlefoot accidentally knocks all of the fruit off of a special tree that no one is to eat from until everyone is there to share it. He proceeds to lay the blame on the innocent Tinysauruses, and the rest of the Valley inhabitants try to chase away and even destroy the innocent micro-dinos. When Littlefoot admits he lied, everyone gives him a disbelieving reaction.
Would Hit a Girl: To be fair, the girl in question can shatter rocks with her head.
You Imagined It: No one believes Littlefoot saw a mysterious blue stone fly over the Valley and land on Three Horn Peak in The Stone of Cold Fire. Except for 2 small dinosaurs that may or not be aliens in disguise.
Cera
"Threehorns never play with Longnecks!"
Fantastic Racism: Especially in the first film. She mellowed pretty fast, though.
Hair-Trigger Temper: It doesn't take much to anger Cera. But this is toned down greatly in the sequels.
Ineffectual Loner: In the first movie, before learning The Power of Friendship and becoming part of the group. In later movies she still has a tendency to storm off by herself after disagreements with the group, but her leave is never permanent.
Jerk with a Heart of Gold: She's bossy, she's egotistical, she's short-tempered, and she'll always come through for her friends.
Ungrateful Bastard: Remains prejudiced against longnecks and even goes so far as to call Littlefoot's mother stupid even after she'd given her life to save her and Littlefoot from Sharptooth.
Like many other negative traits, this too fades out as time goes.
Why Did It Have To Be Heights: Cera doesn't do too well when it comes to cliffs, chasms, and anything involving crossing them. Unfortunately, they face this dillemma at least once a movie
Team Mom: She always comforts and pep-talks everyone, and her plucky personality usually rubs off on everyone aorund her.
Tin Man: In The Big Freeze, Ducky had to ask Cera what the strange emotions she was feeling towards Spike's constant snoring and keeping her awake were. When Cera told her she was feeling angry, Ducky was mystified, because she had never felt anger before, and Cera has to teach her (In song, no less), how to express anger.
Disney Death: He nearly dies when they kill Sharptooth, but he ends up ok.
Ptero Soarer: The original movie verted this slightly as while he was still outdated by modern standards the animators gave him features in accordance to then new theories like walking on all four. Unfortunately, the sequels throws all of those features into the trash bin.
The Smart Guy: Though not so much because he's the most intelligent as he is the most cautious.
Vegetarian Carnivore: Peterie is a Pteranodon, which are known to dine on fish. Yet, he and other "fliers" are shown eating plants and there's no explanation as to why.
Oblivious Adoption: Deals with issues related to this trope in The Big Freeze.
The Voiceless: Except for two instances where he yells Ducky's name when she's in danger, and when he yells "Mama!" as he nearly drowns in a lake.
Later revealed that he can talk but simply chooses not to.
And, when he does "speak", it's usually unintelligible mumbling. Interestingly enough, in one episode of the series, it's shown that his thoughts are quite sophisticated.
In several of the songs, however, he can be cearly seen and heard humming and hilariously enough, scat-singing at a few points. Most prominent during the "Bad luck" song, where he gets several scat-solos, going from lame-o to Satchmo in a matter of seconds.
Disney Villain Death: Falls off a cliff into a lake and drowns. However, unlike most, his is an intentional one on the part of the heroes, though given the situation, it's hard to blame them.
Kill It With Water: Meets his end when the heroes use a rock to topple him into a lake. Due to having stubby arms, he can't swim and drowns.
Made of Iron: His stamina and strength were ridiculous enough, but he survived falling into a deep trench without any actual injury and can smash large rocks with his head with no pain involved.
Not Quite Dead: Is seemingly killed when he falls off a cliff fighting Little Foot's mother. Cera finds out later on he survived and is ticked off!
Roaring Rampage of Revenge: In the novel version that is, because apparently, while Littlefoot fled from him, he sent a thorn flying into one of his eyes, half-blinding him.
Badass Grandpa: Literally. Grandpa is able to keep up with Doc when it comes to fighting Sharptooth. And in a battle in a later film, he and Grandma team up to beat a sharptooth into the ground.
Enfant Terrible: Averted, despite being an infant Sharptooth, he's a very nice guy. However he is often mistaken for this by dinosaurs that don't know him. In fact in one episode of he TV series spinoff, it almost gets him killed.
My Species Doth Protest Too Much: His parents are the only Sharptooth he actually seems to like, otherwise he actually prefers to hang with the Great Valley dinos over his own kind. Probably because other adult Sharptooth seem to attack him on sight as well.
Omniglot: He's the only known Sharptooth to be able to speak Sharptooth and plant eater. This comes in handy at times. Most dinosaur adults seem suitably suprised upon learning of this.
Spotlight-Stealing Squad: Anyone who doesn't consider him an Ensemble Darkhorse thinks of him as this in the animated series. Of all the characters, he has the most number of episodes focused around him.
It should be noted in the movies he never fills this role
Chomper's parents
Deadpan Snarker: Chomper's father. "Sometimes I worry about that boy."
Heel Face Turn: Well sort of. The were entirely villainous in The Mysterous Island but still a danger to the heroes anytime they saw them, until Littlefoot risks his life to save Chomper's. After that, they're much more friendly, even managing to not complain as Cera hugs their leg.
Mama Bear/Papa Wolf: They're very quick to come to their son's aid if he's in danger. Also part the reason they sent Chomper to the Great Valley in the series, to protect him from Red Claw.
Villain Song: "When You're big", a possible contender for the best villain song in the series. Also notable as the first obvious change from the usual kiddy-pop oriented songs of the series.
Ali
Fantastic Racism: Not as bad as Mr. Threehorn gets, but she initially wasn't comfortable interacting with dinosaurs who weren't longnecks.
Brains and Brawn: Ichy is the planner, Dil is the muscle. They're useless without each other, as Ichy is too small to accomplish much and Dil is nearly blind.
Fantastic Racism: When he shows up in the series, he refuses to accept Chomper might be a good guy due to him being a Sharptooth. However, he ultimately learns the error of his ways when the little guy helps save his 'lady friend'.
Anti-Villain: Not really evil per se, but certainly selfish and very reckless. While he has put people in danger before, he never means to do so and wishes no harm on anyone.
Dirty Coward: Accused of being one, after his disastrous leadership.
Ptero Soarer: Unlike his nephew, he was unlucky to be a sequel character, and hence whatever accuracy the original movie's pterosaurs had was not carried on.
Villain Song: "Very Important creature", another contender for the best villain song of the series, mainly because rather than being about how nasty and vicious he is, this song is simply about how brave and strong he thinks he is, and how egotistical everyone else thinks he is.
Well-Intentioned Extremist: He legitimately believes himself to be a good leader and thinks that everyone would be better off with him as such.
Alien Among Us: Never directly addressed, but very, VERY heavily implied, both by their more-than-saurian knowledge of how the world works, and by the shimmering pillar of light that marks their departure.
Know-Nothing Know-It-All: Originally respected as the smartest resident of the Great Valley, having "Been everywhere and seen everything", it is then revealed that he gets most of his knowledge from second-hand sources.
Cool Big Sis: Ruby is the oldest of the kids and goes between this and Team Mom.
Remember the New Guy: She and Chomper are already with the main cast on the first episode without any mention of her past. Even though she gets more details explained later its quite egregious.
Informed Ability: He's said to be one of the biggest, baddest Sharptooth of all time, but he's constantly defeated by a group of children...though said children have a long record of beating Sharptooth.
