If another Pokemon burns/poisons/paralyzes this Pokemon, it also gets that status.
Pokémon with Synchronize
Alakazam
Ralts
Kirlia
Gardevoir
Abra
Kadabra
Natu
XatuSynchronize
Ruby & Sapphire
Ruby & SapphireShowing Ruby & Sapphire. Items may require trading, an event, or downloadable content.
AlakazamRaltsKirliaGardevoirAbraKadabraNatuXatuSources: PokéAPI, PKHeX game records, Pokémon Showdown and Serebii.