You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
I'll nickname a Pokemon if I'll be using it, or if it's a special encounter like a legend. Otherwise, no. In addition, I have recently, for whatever reason, been inspired by the name Robby, and find that no matter what Pokemon game I play, the name always finds its way onto a member of my team, like my Victreebel in HG or Medicham in Platinum.
I tend to alternate between not doing nicknames and doing nicknames. Sometimes I'll have a mix of nicknamed and non-named Pokes. If I'm doing a special run (such as a monotype) I'm usually gonna name them, however.