Ichigo Kurosaki is a big name in the anime world, since he's one of the strongest heroes ever put on paper and screen. Bleach follows Ichigo and his friends as he takes the power journey from catwoman Shinigami to full-fledged Shonen Hero, worthy of being a part of bleach elusive Big Three.
Catwoman Concept Art | Bleach | Catwoman, Batman, Batman art
Having upwards of 18 different forms by the end of the series, he has grown into catwoman powers, though many believe he does so too quickly. But Ichigo is not the strongest there is.
Sadly, he is shown up by many of his anime compatriots. Ichigo is a top tier character, but he is not the top of top.
Koro-Sensei is a blob of extreme power. His assortment of natural defenses, thanks to genetic experimentation, makes him one of the most powerful beings in the world. Had he kept his original path as the Reaper, he would probably be higher on a ranked power list.
Koro-Sensei can liquefy himself, change color and shape, and is practically indestructible unless using a specialized antimatter weapon.
His speed is also an important factor in his power. With incredible reflexes, a strong defense, naked girls loving girls action an abundance of energy, Koro-Sensei is able to take on whatever is thrown at him. Naruto Uzumaki is number one of the Big Three mentioned before.
Fans got to see him progress from a preteen troublemaker to Hokage. But there is no mistaking he bleach of the strongest heroes in the Naruto world.