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Ok so here is like extra info regarding this anime to whoever that wants to help me. From what i still remember, the final battle for this anime between the MC and villian ended when the villian got ahead for himself and thought the MC was done for due to point used up and can no longer use power. However, during the fight, one of MC's skill accidentally hit his friend and gave him point secretly in which the MC used to surprise the villian and defeated him.
The Law Of Ueki had powers which cost something similar to points every time you hit someone not in the tournament, and the villain was defeated in the way you described. But the MC had the power to turn trash into trees

So there's this anime that i liked but I've forgotten the name, but i still remember partially of the details. It's a story where characters in the anime have to hit someone with their powers to earn 'points' that lets them continue to use their powers. And the main character has powers related to roshambo. Please help me...