Can anyone knows why i cant use these pokemons?

Hi everybody. After 4 years i start the game again. But i cant use my half of the pokemons. is anyone know reason?

They are slashed, which means they have been caught using a 3rd party app. Niantic must have figured that out and slashed the Pokémon. Therefore you cannot use them anymore.


Perhaps you just send it to the Professor for a candy.

Since you cannot use them anymore, it will just a waste of space in the bag.

I believe you cannot transfer slashed Pokemon either, but I am not entirely sure.