Re: When Ash gave Sabrina his Haunter, why didn't it evolve?
Did Ash even actually catch the Haunter? It was a long time ago, but didn't it just agree to help him with the battle? Either way, Ash just gave Haunter to Sabrina, so there wouldn't be a trade evolution.
On the subject, what about the Clamperl in the Hoenn episode? Didn't they evolve when they were withdrawn from the PC? That doesn't make sense at all, unless all machines have some kind of radiation that forces a Pokemon to evolve.
VPP: Giratina, Level100 @ 4,554