From best to worse, selected by my personal enjoyment and how good I do with these characters
Zombies
Scientist:
- Physicist (no jokes, that guy is awesome)
- Computer Scientist (impression from the beta, I don't have him right now)
- Marine Biologist
- Chemist
- Astronaut
- Scientist
- Paleontologist
- Zoologist
- Dr. Toxic
- Archeologist
All-Star:
- Rugby
- Tennis
- Wrestling
- All-Star
- Cricket
- Golf
- Moto-X
- Goalie
- Baseball
- Hockey
Footsoldier:
- Tank Commander
- Scuba Soldier
- Camo Ranger
- Footsoldier
- Park Ranger
- Sky Trooper
- Arctic Trooper
- Super Commando
- General Supremo
- Centurion
Engineer:
- Sanitation Expert
- Plumber
- Roadie Z
- Painter
- Welder
- AC Perry
- Painter
- Engineer
- Electritian
- Mechanic
Super Brainz:
- Super Brainz
- Toxic Brainz (just give it to me)
- Electro Brainz
- Cozmic Brainz
- Party Brainz
Imp:
- Z-11
- Shrimp
- Pylon
- Lil' Drake
- Imp
- Party Imp
Deadbeard:
- Captain Deadbeard
- Captain Sharkbite
- Captain Partyman
- Captain Flameface
- Captain Cannon
Plants
Cactus:
- Camo Cactus
- Fire Cactus
- Jade Cactus
- Cactus
- Future Cactus
- Zen Cactus
- Pertrified Cactus
- Power Cactus
- Ice Cactus
- Bandit Cactus
Peashooter:
- Agent Pea
- Law Pea
- Rock Pea
- Peashooter
- Toxic Pea
- Fire Pea
- Ice Pea
- Plasma Pea
- Electro Pea
- Commando Pea
Sunflower:
- Shadow Flower
- Vampire Flower
- Sun Pharao
- Metal Petal
- Fire Flower
- Sunflower
- Stuffy Sunflower
- Power Flower
- Mystic Flower
- Alien Flower
Chomper:
- Power Chomper
- Fire Chomper
- Disco Chomper (my friend says that he's pretty decent)
- Count Chompula
- Toxic Chomper (moostly because of his design)
- Armor Chomper
- Hot Rod
- Unicorn Chomper
- Chomper
- Yeti Chomper
- Chomp Thing
Citron:
- Iron Citron (I feel bad for anyone that does not have it)
- Citron
- Electro Citron
- Frozen Citron
- Party Citron
Kernel Corn:
- Pops Corn
- Kernel Corn
- BBQ COrn
- Party Corn
- Mob "sucks so much they should replace it" Cob
Rose:
- Rose
- Fire Rose
- Druid Rose
- Party Rose
- Frost Rose