Yes, Obito is evil. It was revealed in the Manga that Tobi was
Obito.
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no it is rumered that Tobi is madara uchiha in obito's body but
no pein is not obito
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Obito
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Technically Obito lost his fight against the fourth, Obito
managed to force 4th to flee with Naruto, but during their later
struggle 4th defeats Obito buy teleporting to a kunai behind
Obito