¿Who is stronger, Buu or Doomsday?

Majin Buu is a pivotal antagonist in the "Dragon Ball" series, introduced during the "Majin Buu Saga" of "Dragon Ball Z." Created by the dark wizard Bibidi, Buu is an ancient entity with immense power and a malleable, pink physique. Throughout the series, Buu undergoes several transformations, each altering his personality and power levels, including Innocent Buu, Evil Buu, Super Buu, and Kid Buu. His abilities are vast and versatile, encompassing regeneration, absorption, and transmutation, such as turning adversaries into sweets. Despite his initial role as a villain, aspects of Buu's character, particularly in his Innocent form, display a capacity for change and even benevolence. This complexity adds depth to his character, making him one of the most memorable antagonists in the "Dragon Ball" universe.

Doomsday is a comic book character created by DC Comics and is known to be one of the publisher's most powerful and feared villains. He is a cosmic monster who has come to Earth with the goal of destroying everything in his path and becoming the supreme being in the universe. Doomsday has a number of supernatural powers, including superhuman strength, immortality and the ability to regenerate any part of his body. He is also virtually indestructible, making him a formidable foe for any hero who confronts him.