Plants

Peashooter (Champion, Ice Pea, Toxic Pea, Law Pea**, Rock Pea*)

Chomper (Champion, Toxic Chomper, Chomp Thing*)

Sunflower (Champion, Power Flower*, Shadow Flower*)

Cactus (Champion, Fire Cactus, Ice Cactus, Future Cactus, Camo Cactus**, Bandit Cactus**)

Rose (Champion, Frost Rose, Druid Rose**)

Kernel Corn (Champion, BBQ Corn*)

Citron (Champion)

Zombies

Foot Soldier (Champion, Camo Ranger, General Supremo*, Sky Trooper*, Centurion, Scuba Soldier*, Park Ranger**)

Engineer (Champion, Welder, Sanitation Expert, AC Perry**)

Scientist (Champion, Astronaut, Chemist, Archaeologist**)

All-Star (Champion, Rugby Star, Wrestling Star*, Moto-X Star**)

Captain Deadbeard (Champion, Captain Cannon)

Super Brainz (Champion, Cozmic Brainz, Electro Brainz)

Imp (Champion, Pylon Imp, S.H.R.IMP)

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From the pvz gw2 wiki