[Theory] how did ichigo get so strong?

[kaddie9]

zangetsu stabbed ichigo while he was mixed with his hollow thus giving ichigo access to their full power. the chain wrapped around ichigo's shoulder shows zangetsu and ichigo's hollow fused together. like when aizen turned half hollow half shinigami he said "both our swords have came to the same evolution", aizen was already part hollow so his hollow and sword fused together also.

 

[Moss]

Trick question, he didn't.

 

[Fermion]

Bcoz Ichigo was the hero and Tite Kubo had to make him stronger than aizen by anyway, with any logic to make aizen lose so to give a happy ending to the arc.
If Naruto were bleach than Naruto would had sage mode,bijuu mode along with ems,byakugan,rinnegan and wood release just like Ichigo has Shinagami,Hollow,Fullbring and now even quincy powers....

 

[Darth Wignus]

Ichigo is a bottomless pit filled with raw power. So he will always be stronger than the villain.

 

[animeklu]

become the main character and u are always going to end up strong

 

[adventnova]

Ichigo is a bottomless pit filled with raw power. So he will always be stronger than the villain.

^ This as stated in the very beginning of the Manga/Anime right after he scarred his first Menos Grande, Urahara said that in similar words.

- Also my theory - Having Shinigami Powers, one can only train and build up their Reiatsu/Reishi pool, making them stronger but they will always seem to have a limit. Adding Hollow Powers to the mix gave him a booster in both his power pool and the ability to attack with a negative force (hollow powers vs shinigami powers), which also gave him an advantage.Due to him being part Quincy and his powers always being there just never known to himself, Quincy's have the ability to absorb spirit particles and direct them into a condensed attack. So when you combine his Quincy ability of spirit particle absorption into the mix his reiatsu/reishi pool is near unlimited as he can pull any amounts of energy from the depths of his inner self to be able to fight near death (as seen many times over and over). Everytime you see his eyes glow blue, he gathers extra power. no one else in the anime has that happen.