How come in Harry Potter every time sees Tonks she says Wotcher Harry?

Tonks doesn't actually say "Wotcher Harry" every time she sees Harry in the Harry Potter books. That phrase is more associated with the character of Ron Weasley.

Tonks, being a member of the Order of the Phoenix and a skilled Auror, often greets Harry with a more formal "Hello, Harry" or simply "Harry." She also sometimes uses nicknames like "H" or "Kid."

It's possible that the phrase "Wotcher Harry" is more ingrained in your memory due to its frequent use by Ron, who often interacts with Harry and Tonks.

Let me know if you have any other Harry Potter questions!