Tite Kubo's Bleach was once a part of shonen's big three, along with One Piece and Naruto, and it's easy to see why. Bleach dazzled fans with its exciting combat system, huge cast of lovable characters, and most of all its grouchy swordsman hero, Ichigo Kurosaki. Ichigo has defeated many powerful villains in the story of Bleach, from Ulquiorra to Grimmjow and Aizen.
Ichigo won his final victory against the Quincy king Yhwach, but now he must challenge powerful villains from other shonen and seinen anime series, and he might not be ready. Ichigo may be a powerful substitute Soul Reaper with his bankai and Hollow mask, but some anime villains are too tough, even for him.
10 CAN DEFEAT: Ichigo Could Take On Tetta Kisaki Bare-Handed (Tokyo Revengers)
Ichigo doesn't need his zanpakuto, Zangetsu, to take on certain anime antagonists. No one in Tokyo Revengers uses zanpakuto or spiritual powers, Ichigo will take on Tetta Kisaki with his bare hands as a fellow punk just for sport.
Ichigo is used to fighting bare-handed, and he has only gotten faster and smarter after training with Kisuke Urahara and Yoruichi Shihoin. Kisaki thinks he owns these streets, but Ichigo will call an ambulance for him ahead of time, then teach him a lesson.
9 CAN'T DEFEAT: Lord Boros Can Send People To The Moon (One-Punch Man)
Lord Boros is a powerful alien overlord from another galaxy, and he was the Saitama of his own empire. No one could challenge him, so Boros boarded his flagship and began cruising the stars, desperately searching for anyone who could stand up to him in battle.
Boros finally found a worthwhile challenge in Saitama, and at full power, he can send the invincible Saitama flying all the way to the moon. Ichigo Kurosaki could keep up with Boros at first, but it's tough to imagine him breaking through this alien king's defenses when Boros is at full power. Only Saitama could have beaten him.
8 CAN DEFEAT: Ayato Kirishima Will Get Sliced And Diced (Tokyo Ghoul)
Only quinques, weapons made from the kagune of fallen ghouls, can permanently kill a ghoul. Even without a quinque, powerful anime heroes such as Ichigo Kurosaki can pulverize most ghouls and effectively kill them temporarily. Ghouls can't fight if they're reduced to a pile of chopped meat.
Ayato Kirishima, for example, wouldn't last long against Ichigo Kurosaki. He is fairly powerful, a close and long range fighter, and can threaten Ken Kaneki. But a well-timed Getsuga Tensho, and a few sword slashes from Ichigo will soon humble him.
7 CAN'T DEFEAT: Captain Blackbeard Wields Darkness (One Piece)
Captain Blackbeard once betrayed Captain Whitebeard and started his own pirate crew, quickly gaining a fearsome reputation across the world. Blackbeard was already a formidable fighter with his Dark-Dark Fruit, and then he somehow stole Whitebeard's Tremor-Tremor Fruit during the Marineford war.
Blackbeard can't easily keep up with Ichigo's extreme speed, but his two Devil Fruit powers should allow him to hold Ichigo off if Blackbeard holds nothing back. Not even Ichigo could easily escape the all-consuming darkness of Blackbeard's powers.
6 CAN DEFEAT: Daki Stands No Chance (Demon Slayer)
The demons in Demon Slayer are similar to ghouls in that they can only be slain with specialized weapons – in this case Nichirin blades, which are like the quinques of Demon Slayer. Demons can regenerate from nearly any wound. Akaza in particular, can regrow severed limbs with frightening speed.
Demons are vulnerable to decapitation, and Ichigo has what it takes to dispatch the Upper Moon Six, Daki without too much trouble. Even if Gyutaro shows up, Ichigo could obliterate him too and reduce the demons to dust with Getsuga Tensho. Daki and Gyutaro will barely survive, but they will definitely lose the fight.
5 CAN'T DEFEAT: Kaguya Otsutsuki Is Untouchable (Naruto)
Naruto Uzumaki narrowly defeated the moon princess Kaguya Otsutsuki with the power of friendship more or less, but Ichigo Kurosaki won't be so lucky. He must face the progenitor of chakra all on his own, and it's not going to turn out well.
Kaguya knows all jutsu and is the master of chakra, and Ichigo would be lucky to land a single blow on her with his Getsuga Tensho. Her Eighty Gods Vacuum Attack would prove lethal on Ichigo, and Kaguya has the speed to back it up, too. Ichigo is fast, but so is Kaguya, robbing Ichigo of one of his few advantages.
4 CAN DEFEAT: Not Even Overhaul Can Handle Getsuga Tensho (My Hero Academia)
The mighty crime boss Overhaul has a Quirk of the same name that allows him to reshape matter with a touch, either to heal it or destroy it. In battle, Overhaul can easily heal his wounds and reshape the terrain to form weapons or defensive barriers, which may slow Ichigo down.
If Ichigo dons his Hollow mask, no villainous Quirk can stand up to him. Ichigo's speed is too much for Overhaul to handle, and a single Getsuga Tensho will obliterate his body and shatter the battlefield. Overhaul won't get a chance to heal after such an attack.
3 CAN'T DEFEAT: Pride's Shadows Can't Be Slain (Fullmetal Alchemist: Brotherhood)
Of all anime villains, the homunculus Pride is among the most difficult to destroy, since his "Selim Bradley" body is a near-indestructible container and nothing more. The real Pride is a being made entirely of shadows, and can monitor, eat, or skewer anyone who gets in his way.
Ichigo is quick enough to evade Pride's attacks, but not even the Getsuga Tensho will do any good against this homunculus, and neither will sword slashes. The best Ichigo can hope for is Pride exiting the battle to do something more productive elsewhere. Ichigo can survive Pride, but he can't actually win.
2 CAN DEFEAT: Ozai's Flames Can't Block A Sword (Avatar: The Last Airbender)
Firebenders are excellent on the offensive, since firebending is an aggressive art. However, Firebenders have few options for defense aside from physically dodging enemy blows or creating smokescreens to hide in. Fire Lord Ozai can demolish any bender, but he never faced a Soul Reaper before.
Ozai's flames are too slow to handle Tensa Zangetsu. A single Getsuga Tensho can blast away all of Ozai's flames and leave him vulnerable. Ichigo may then get up close and personal, and slash Ozai wide open across his chest.
1 CAN'T DEFEAT: Dimaria Yesta Can Control Time (Fairy Tail)
A few anime characters can actually freeze time to slay their opponents with impunity. Heroes such as Ichigo Kurosaki cannot defeat any of them. The hero can only survive if they somehow control time as well, such as Jotaro learning DIO's trick or Ultear helping Wendy and Sherria to break free of Dimaria Yesta's power.
Without that time-freezing power, Ichigo stands a good chance against Dimaria, especially if he dons his Hollow mask. However, Dimaria can trap Ichigo in time, then deal a mortal wound and leave. Ichigo couldn't even land a scratch.