Pop Green

Pop Green (ポップグリーン) are the seeds of the hostile plants found in the forest of "Greenstone" on Boin Archipelago. It can grow from seeds to full-sized plants in moments.

History
Heracles uses these seeds as bullets and weapons. According to him, they have various uses, and he taught Usopp how they work.

Usage
Not much is known about the Pop Green's usage, but it can be used to create plants. How they are triggered is currently unknown. Usopp fires them with his new Black Kabuto and it summons a carnivorous plant to attack the target on impact. Each type of seed also has a different color scheme, which Usopp can use to tell what each one is capable of.

Usopp's Attacks
After two years of training with Heracles, Usopp gained mastery of the Pop Green as a new type of powerful weapon. According to Heracles, these seeds have various uses, especially in combat.