Corn is a species of plant, that grows in many places around the world, and was also featured on the Club Penguin Island. It was mostly seen as Popcorn, and could also be grown in the Community Garden at the Mine Shack.
It was used and seen in PSA Mission 11: The Veggie Villain, and was also used as an explosive in the Popcorn Bomb.
Gallery
A package of corn
The Popcorn Bomb, that used the expansion of corn seeds to explode the HQ
Corn seeds
A corn stem