There is a player called Jeager.
He provides 15k/poke evs training service on the trading channel.
I add friends with him. He took my pokemon, but later he deleted me afterwards.
I don't have a screen shot.
The victim is not only me,
In the game, there are other people who have also taken the pokemon by Jeager and then delete the friend.
my pokemon
Pikachu
Feebas
Koffing
Magnemite