Poison Swish

Poison Swish attack lanes higher and lower instead of his lane. Poisons zombies every five hits

Strategies
He can be used against stronger zombies like Buckethead or Brickhead, because Poison avoids armor

Powered by Moonflower
He, like every other shadow plant, can be powered by Moonflower

When placed near Moonfower, he'll gain third vine to attack line he is on and zombies can spread the poison effect for other, nearby zombies

Plant Food Ability
Plant Food:

Kill 3 zombies nearest the house from line above and under him (and line that he is on, if upgraded by Moonflower)

Golden Plant Food:

Kill 5 zombies nearest the house from every line and poisons the rest of them

Trivia

 * It's sixteenth plant made by me
 * And it's my first Shadow Plant
 * His attack was based on my unrealized project of Twin Pea, which shot at line above and under him
 * And this is the only similarity
 * First concept version wasn't Shadow Plant