9999 Explode-O-Nut VS All Zombies - Plants Vs Zombies 2 Big Wave
Explode-O-Nut is an explosive version of the Wall-nut. Once defeated, they explode in a 3x3 area, similar to the area of a Cherry Bomb, dealing 1800 damage per shot to any zombie(s) caught in the blast.
Explode-O-Nut was released with the 5.0.1 update, as a special-edition premium plant to celebrate the 2016 Summer Nights event, where they are purchasable for $4.99 (Originally $2.99) alongside Strawburst. Explode-O-Nut remains on the tile where they were planted, and when destroyed by any means (except being burned, thrown off the lawn, or shoveled), they will explode.
In the 7.9.1 update, Explode-O-Nut became available as a seed-packet-obtainable plant on February 25, 2020, tied to Iron Age Antics in Penny's Pursuit.