this post makes no sense and none of it is true.
once again
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those sealed in reaper fight amongst themselves, the caster and the one who was sealed
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the key to gain kcm is to fight the bijuu and steal its chakra
minato fought the kyuubi and stole its chakra hence kcm
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the key to gaining bm is to befriend the bijuu or get him to cooperate
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yin kurama was moved by naruto's speech and thus wanted to cooperate
and minato gained bm
other hokages did not get powerful because they gained nothing from fighting amongst themselves
though considering you are a famous troll and many people stopped paying attention to you, this is a futile attempt but i hope those viewing thread can benefit from this post
crying about other characters while not get sasuke a power-up so stop crying
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You do realize that Sasuke is a representation of "The Eyes" meaning he is representative of the Rikudo's older son representing Spiritual energy. while Naruto represents "The Body" a representative of the Younger son representing stamina and strength. Sage Mode is a "Body" Technigue hence why Sasuke doesn't have it. Sasuke is a "Spiritual" Type not a body type. Thus making him incompatible with Sage Mode. Sasuke's power ups are spiritual not body wise, meaning his power ups are focused on his eyes not his body.