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Incorrect!
Funimation
Katsuki Bakugo's alias is Kacchan.
As you may know, Midoriya and Baguko have been friends from an early age. The first part of this nickname is "Ka" - the first two letters of Katsuki's name, and "Chan" is a kind of term for someone cute. It is used to refer to children and female family members, close friends, and lovers.