KillPlant

KillPlant (キルプラント) is a virus from the Mega Man Battle Network series. They are stationary plant-type viruses that spit out seeds. If the seed does not land on a target, it stays on the panel. A few seconds later, the seed turns into a target-seeking wooden spike.

KillPlant
KillPlants are red with a light-green base.

KillWeed
KillWeeds are blue with a dark-green base.

KillFleur
KiilFleurs are black with a purple base.

KillPlantΩ
KillPlantΩs are pink with green-blue base. Exclusively in Phantom of Network.

Battle Chips
Tree Bomb, known as Forest Bomb (フォレストボム) in Japan, is the Battle Chip family from KillPlant viruses. The user throws a seed three squares ahead. After a while, it grows into a Wood Tower and moves forward. The seed will automatically change when hit with an Aqua attack.

Trivia

 * KillPlant was nicknamed Tanemaki-kun (種まき君) during development.