Who was the bad lion in Lion King?

The bad lion in "The Lion King" is Scar. He is the main antagonist of the story, known for his cunning and treacherous nature. Scar is the brother of Mufasa, the rightful king, and he plots to take over the Pride Lands by murdering Mufasa and manipulating Simba, Mufasa's son. His actions ultimately lead to his downfall and the restoration of balance in the kingdom.