How The Pokedex Works
So it's been speculated on how the Pokedex works, even to the point it has been called in accurate.
So much in fact that it has been concluded by many that the Pokedex is written by the trainers who carry them around. That the reason the descriptions in the Pokedex are so absurd is because they are being written by the player character not knowing what they are writing. This is something I have even been guilty of.
However, this actually not how the Pokedex works in the games, and we have actually been told how they work in basically ever game.
Now ignoring how the Pokedex works in the anime given it is a separate continuity and is clearly pulling from a preexisting database rather than needing to be filled out. Also, I won't be taking into account the Pokedex from Legends Arceus, because that Pokedex is different the ones from throughout the rest of the series.
So when you receive your Pokedex from a Professor like Professor Oak, you are told directly by them how a Pokedex works.
"On the desk there is my invention, Pokedex! It automatically records data on Pokemon you've seen or caught!"
In other Words, the Pokedex itself is the one doing the recording, not the trainer nor the professors. This also, explain why the Pokedex isn't completely filled out until you caught a Pokemon. The data being recorded automatically is probably due to the Pokedex scanning the Pokemon.
This is actually further established in Pokemon Origins which treats the Pokedex in the exact same way.
This also means that every single entry is meant to be taken literally, and is not simply just a exaggeration written by a child or ignorant professor.
Also, this actually explains why we have seen in the games, and yes even the anime; several instances of Pokedex being confirmed as valid.
PKMNB: "Litwick shines a light that absorbs the life energy of people and Pokémon, which becomes the fuel that it burns."
PKMNSAPPHIRE: "Gardevoir has the psychokinetic power to distort the dimensions and create a small black hole. This Pokemon will try to protect its trainer even at the risk of its own life."
PKMNP: "It tugs on the hands of children to steal them away. However, it gets pulled around instead."
PKMNR: "Nosepass's magnetic nose is always pointed to the north. If two of these Pokemon meet, they cannot turn their faces to each other when they are close because their magnetic noses repel one another."
Now people have tried to argue that the dex entries can't be accurate because in the case of Gardevoir, black holes don't work like that. But this ignores that the Pokemon world is not the real world and doesn't play by the rules of the real world. This world has magical creatures that can use all types of elemental powers, and humans are just built different.
Someone might even mention Magcargos dex entry tells us that Magcargo is hotter than the sun and couldn't exist on the Earth, meanwhile in real life we have already had such examples of things being hotter than the sun. But that aside, the Pokemon world is again probably just built different.
Now one might ask why the Pokedex in different games have different entries? Well my hypothesis is given each time it is a different type of Pokedex, the data that gets scanned is at times different. Thus, outputing different information that is recorded about said Pokemon. Written by Eris

















