Can't evolve magneton to magnezone using thunder stone

[reverfurgal]

it says reverfrugal has use thunderstone to magneton but nothing else happened.

 

[summery463]

it doesn't evolve that way, go to the suspicious shopper in the 0,0 Pokemart with a magneton on your team

 

[Mike]

non gen 8 pokémon use gen 7 data. the thunderstone evolution for magneton charjabug and nosepass was a gen 8 addition. with no magnetic field areas existing either, they were added to the list of pokémon the suspicious shopper summery mentions as a workaround.