This is a "Wild Mass Guess" entry, where we pull out all the sanity stops on theorizing. The regular entry on this topic is elsewhere. Please see this programme note.
Drake & Josh are a reality show in the live action Nickverse:
That's why when Helen was on Victorious she retained her personality and when why see Craig and Eric in other shows they retain their personalities even though it's established in Victorious Drake and Josh was a show within a show.
The Nickverse and Tarintinoverse are one and the same.