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What Pokemon characteristics are immutable as of gen 9 games?

I'm picking up Pokemon games with Violet and learning about every additions made to the game since gen 2, I'm having a hard time figuring out what are the Pokemon characteristics you can't change through grinding the games.
If I'm not mistaken, besides the Pokemon shinyness, you can now change every other aspect of your Pokemon, right? IVs are uppable with training, EVs are grindable through items and resettables with enough berries, nature can be changed with spices.
Is shinyness the only immutable characteristic of your Pokemon or are there others?
Question from user Oddrigue at gaming.stackexchange.com.
Answer:
As you correctly wrote, shininess is immutable.
But there are other properties that can't be changed:.
Base stats.
Gender.
Actual Nature (mints only change the effect of the Nature).
Characteristic (indicates which stat contains the highest IV).
Dudunsparce's form.
Maushold's form.
Size.
Most of them are related to Pokemon's Personality value, which is randomly generated and can't be changed:.
A Pokémon's personality value is an unsigned 32-bit integer that is created when the Pokémon is first generated by the game. For Pokémon encountered in the wild, it is set upon encountering them. For gift Pokémon and Eggs, it is set upon receiving them or when the Day-Care Man finds the Egg.
Answer from user pinckerman at gaming.stackexchange.com.

I'm picking up Pokemon games with Violet and learning about every additions made to the game since gen 2, I'm having a hard time figuring out what are the Pokemon characteristics you can't change through grinding the games.
If I'm not mistaken, besides the Pokemon shinyness, you can now change every other aspect of your Pokemon, right? IVs are uppable with training, EVs are grindable through items and resettables with enough berries, nature can be changed with spices.
Is shinyness the only immutable characteristic of your Pokemon or are there others?
Question from user Oddrigue at gaming.stackexchange.com.
Answer:
As you correctly wrote, shininess is immutable.
But there are other properties that can't be changed:.
Base stats.
Gender.
Actual Nature (mints only change the effect of the Nature).
Characteristic (indicates which stat contains the highest IV).
Dudunsparce's form.
Maushold's form.
Size.
Most of them are related to Pokemon's Personality value, which is randomly generated and can't be changed:.
A Pokémon's personality value is an unsigned 32-bit integer that is created when the Pokémon is first generated by the game. For Pokémon encountered in the wild, it is set upon encountering them. For gift Pokémon and Eggs, it is set upon receiving them or when the Day-Care Man finds the Egg.
Answer from user pinckerman at gaming.stackexchange.com.
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