Undergrowth

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Undergrowth is a character who first appeared in the Danny Phantom episode "Urban Jungle". Angered that the people of Amity Park were destroying his children for urbanization, he attacked and used mind vines to turn everyone into his slaves. With Sam turned into his "daughter", he had her attack Danny, however, with his currently uncontrolled new ice power, manages to escape. Sometime later, Danny returned, having finally mastered his ice power thanks to Frostbite. Using it, he managed to destroy Undergrowth's new plant world by defeating Undergrowth. Undergrowth was reduced to a shrub, that was destroyed by Tucker's lawn mower.

Undergrowth regards plants over all life. To him, they are his "children". He sees humans as fragile, temporary lives that won't last long; "Humans are merely a temporary weed in the garden of life...a weed that can be removed." He prefers using humans to do his dirty work. If he has any weaknesses, the main one would be extreme cold (and assumably fire). Danny's freeze powers weakened Undergrowth completely. His roots & brain are also his main weak spot. Also, when destroyed he will revert into a weed-like state that might take a long time to return to normal. When last seen at the end of "Urban Jungle", he had managed to regenerate into a small, rudimentary form, only to be reduced to mulch by Tucker's lawnmower.

Undergrowth can use mind vines to take control of humans and can grow to enormous sizes. He also does not appear the have the basic ghost powers(aside from intangibility and flight) he is one of the three ghosts that can easily regenerate lost body parts and from being blown or shattered into peice