Yes, Detective Conan has an official Twitter. The twitter account is named conan_file, and it's the official detective conan twitter! The twitter account was released July 14th because it was Shonen Sunday's 3000th issue, and Detective Conan is one of the more famous mangas released in the magazine. From what we've seen, the twitter account is supposed to be Conan Edogawa quoting the manga series and occasionally giving hints about Detective Conan that will be revealed!

See it for yourself
link

As we just mentioned, Shonen Sunday has released it's 3000th issue July 14th. The Shounen Sunday series...