>>52647245It's depends, entirely, on the mechanics of the zombies and your interpretation of the types and individual Pokedex entries.
Marvel Zombies, for instance, tends to inflict undead status through mere physical contact, not even necessarily requiring scratching.
This would, without plot armour, completely roll the entire Pokeverse, largely because of priority moves such as ESpeed.
On the other hand you have things like the Walking Dead, where you typically need to die with your brain intact to become a shambling corpse.
This would, without copious idiot plots, be so completely fine in the Pokeverse it's unreal; The raw friendship focus Pokemon has is basically the antithesis of what the Walking Dead is built to critique.