うえきの法則 [Ueki no Hōsoku]

In Takuya Ueki's Ueki no Hōsoku (2001–2005), a celestial tournament grants middle-schooler Kōsuke Ueki the power to turn trash into trees, pitting him against other students with bizarre abilities in a battle royale for a godlike prize. Published by Shogakukan over 16 issues, this shonen manga blends inventive superpowers with a tournament structure, earning a dedicated following for its underdog hero and strategic combat. The series stands as a cult classic of early-2000s manga, celebrated for its imaginative premise and the earnest, scrappy spirit of its protagonist.