Snow Pea: Stays the same.
Torchwood: Stays the same.
Imitater: Slightly belongs to PvZ2.
Chomper: PvZ2, absolutely. Who needs a 4-cost 2/2 plant just to destroy a limited strength zombie?! Why don't use that hammer?
Toadstool: PvZ2. Don't know why.
Cactus: Stays the same.
Electric Blueberry: PvZH, because no need to recharge and higher health.
Jack O' Lantern: Maybe PvZ2, since he has far range.
Witch Hazel: Stays the same.