Mabostiff, Arvin's elderly and Ill dog Pokémon, recovers little by little as he is fed the Herba Mystica. While the final herb initially seems not to work, causing momentary worry that he will not recover from his illness, it does eventually bring the dog back to full health. By the end of the game, he's strong and healthy enough to be the strongest Pokémon on Arvin's team.
Arven's parent (mother or father depends on the game version) seems to have abandoned him. The truth is even sadder, and they never had a chance to say goodbye.
The players rival Nemona is implied to secretly be following them throughout their gym challenge so she can monitor their progress and appropriately match their ability in battle, however this is not portrayed in a negative light and the player character never gives any indication that it bothers them.
A group of bullied students form a team with the intention of confronting their bullies in a fair fight, and the bullies immediately back down. However, the team stays intact afterwards and are shown to be pushy with other students, quick to start fights, and making a nuisance of themselves by setting up roadblocks and claiming large areas of land for themselves.
Azumarill, Wigglytuff, Umbreon and Sylveon (debatably), and, by Home transfer, the Scorbunny line and Magearna are all available and can be damaged like any other Pokémon.
In one of the books in the library it's mentioned that the gym leader Ryme had a puppy pokemon as a teenager, but it died and became a greavard (implied to be D.J. G. Rave).
Dragon Pokémon are in this game, and one of them (Dragapult) is part ghost type, but they don’t die aside from fainting in battle. They can be revived with a Revive item or at a Pokémon Center.
Pokemon can get put to sleep with moves like spore or sleep powder, but they will recover in a few turns and nothing illicit or bad happens while they're asleep.
In the main game, bullying is discussed but never shown, only its aftereffects. During The Teal Mask, the Loyal Three beat up a defenseless Ogerpon and it feels a lot like bullying.
Sort of. There’s a Pokémon move called Wrap used by many snake or serpentine like Pokémon (as well as bugs and Pokémon with tentacles and Pokémon with vines) can bind Pokémon and give them damage for several turns. The effect goes away after a while.
There are no body horror tropes used in the game, and pokémon that would embody this trope aren’t available in this generation. So safe to say no body horror.
The pokémon Veluza cuts off its own flesh to charge at the player. There is no animation for this, but the flesh it tore off is a collectible crafting item that’s gained after defeating a wild Veluza.
A big mechanic of the game is pokémon fainting when defeated. Pokémon can also be put to sleep with status effects. It isn’t presented in a triggering manner though.
A professional snowboarder is mentioned to have had a career ending injury, but the details of the injury are not made explicit and happen before the game begins.
Early on the player falls off a cliff but is stopped from being injured by the Pokemon Rotom which lives in their smartphone slowing their fall before they hit the ground. This will also happen if the player jumps off a cliff without the use of their rideable pokemon. They are never injured from this.
A parent is revealed to have died offscreen before the game began. The death isn't described very specifically, but they do leave behind a child who has to come to grips with the loss.
One of the main characters father/mother (depending on the game version) is revealed to have died before the events of the game, and the one we see is a AI
An AI encountered near the end of the storyline is forced to fight you against its wishes, which looks a lot like possession (moving against its will, sometimes verbally objecting to its own actions, etc)
Ghost-type Pokémon are common, especially at night. Some of their Pokédex entries describe them having malevolent behavior or sapping energy from the living. Catching them and reading those entries is optional, and accidental encounters can be escaped if you make sure to carry Poké Dolls, which are sold at any Pokémon Center.
Pokemon can be bathed during picnics including human like Pokemon, but the scene consists of scrubbing them with a sponge and hosing them off. There is no nudity and no removal of any clothes.
The player and their Pokémon are sometimes seen being grossed out by food when they’re eating it, but they don’t throw up. The eating animation kind of resembles throwing up too, but that’s due to the animation not being done very well. They’re just eating very intently.
At first, it may appear that the Titan Dondozo ate a Tatsugiri. Turns out that Tatsugiri is also a Titan, and this is how the two Pokémon fight as one.
The mount Pokémon (Koraidon/Miraidon, depending on game version) is implied to have some psychological trauma, which is why it refuses to battle. It's not touched on very frequently, however, only brought up in a few cutscenes on the Path of Legends questline and in the endgame.
No characters have D.I.D., but one robotic character essentially has their entire personality pushed overwritten as another personality takes hold as a sort of failsafe protocol. Their original personality returns on their defeat.
(SPOILERS) Not really “dying”. A character who is an AI ends up traveling far into the future/past (depending on the game) in order to stop a catastrophe from happening, which could be comparable to suicide. They’re presumably alive after traveling, but we don’t know for sure.
Not by design, but due to visual glitches (as of 1.0.0 and 1.0.1), textures can sometimes rapidly flicker in and out of existence over large areas of the screen.
One random NPC you can battle comments about having “thick fat” that protects him from cold weather, referencing the ability Thick Fat. This is lighthearted and not really meant to be making fun of anybody. But worth mentioning.
Nobody died during the events of the story, however someone does die prior to the events of the game. They’re not black though, they don’t really have a specific race either but as the game location is based off of Spain they could be seen as Hispanic.
There are no skirts or dresses available for the player to wear, but clothes aren’t gender locked. NPCs will sometimes compliment the character’s fashion sense. So nobody is made fun of for wearing feminine or masculine clothes.
Not in the main game, but in The Teal Mask it is revealed that *SPOILERS* Ogerpon was not an evil ogre, but an ogre visitor from a faraway land that was chased away by the masses.
People may name their character or Pokémon after N words, but most of them are blocked by the in game swear filter. However people may evade this by misspelling a word or replacing letters with numbers.
Technically inbreeding of pokemon is possible as the game doesn't track whether any two pokemon are related or not, but it's not shown on-screen and hand-waved as an egg just mysteriously appearing in your basket.
Mr. Hassel, one of the Elite Four and the art teacher at Naranja/Uva Academy, bursts into tears of joy when he's defeated in battle. However, nobody ever ridicules him, and they just accept that he wears his heart on his sleeve. Hassel himself sometimes apologizes for it, but mostly because he's your teacher and he feels it's improper to lose his composure in front of a student - not because it's "unmanly" or anything like that.
One character (who is noticeably pale and tired-looking) talks about being extremely ill in the past. It's unclear whether this was an isolated event or an ongoing illness that he happens to have under control during the events of the game.
When a Starmobile faints, the car collapses and is shown to become more damaged the lower its health gets. Though they do not actively crash into anything and rather breakdown on the spot. Though the Starmobiles will ram into your pokémon in some of their attack animations. No one is injured, and the Starmobiles simply stop fighting because they become exhausted.
To add to the above comment, there are no tire screeching sounds when riding on Koraidon. If this sound would bother you, it can be easily avoided by playing Scarlet version instead of Violet.
No blood or gore during fights. Pokémon battles are very cartoony. Though (SPOILERS) a character is covered in crystals near the end of the game which sort of resembles stylized gore.
No one is at risk of drowning. Even if the player accidentally falls into water (before obtaining the ability to traverse it,) the screen will fade and read "You managed to scramble back out of the water!" before putting you back on the last solid surface you were on.