Danceshew

Danceshew is a plant, that when planted. Will start to dance and eventually get Dancing/Partying Zombie's attention, they will attempt to eat Danceshew and Danceshew will end his dance with some fireworks appearing behind him, these fireworks will hit the ground and kill the Zombies.

Almanac Entry
Danceshew

Danceshew will dance and attract Dancing/Partying Zombies, he will then stop dancing and fireworks appear behind him

Danceshew thinks his dancing is Amazing, His brother however, is not amused.

Strategy
When Danceshew is planted, he will start to dance if there is Dancing/Partying Zombies, he will then get their attention and if all of them are in the same lane as Danceshew, he will stop dancing and will do a pose. Fireworks appear behind him and these fireworks will hit the Zombies killing them.

You best plant him when Dancing/Partying Zombies appear, because he doesn't have effect on any other zombies that don't dance/party. You also better plant him behind a defensive plant due to his delayed Fireworks, he might get killed before the Fireworks even hit the Zombies.

Trivia

 * Danceshew is a pun on "Dance", "Shoe" and "Cashew", and I didn't even know I made a pun.
 * Danceshew and Cashew was thought about at the same time, and are inspired by the same plant.