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Looking at the dates you provided, it looks like your brother was born before your father became a citizen. If that’s the case, citizenship isn’t automatic. It also looks like he is beyond sponsorship age for dependant PR.
He was 11 years old at that time my father became a Canadian citizen can he get any type of status ?
 
He would have to qualify on his own to become a PR. In his situation, there is no benefit to his father being a citizen.