Wing man a good or bad thing when trying ask a girl out?

Its seen good idea to have a fellow guy help his bro out because he shy, he think she out his league, he clueless about what going on, and so on. I don't know if this a bad thing in view of a girl. Does hinder or magnify the guy more or less.

Its a bad thing.
Good thing
Its just a way for building confidence when the real deal going to happen
not really a bad thing just show the weakness that he could not do on his own.
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Wing man a good or bad thing when trying ask a girl out?
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