Since I believe you have 1 left, if you can trade, take the Charmander found on page 88 or in my sig. Solo Lance and Blaine.
If not take a Wooper. It may never know Water, Ground, Ice or boosting moves. Solo Lance and Blaine in order to evolve. KO 3 pokemon in the rival dual battle and 1 of Red`s pokemon anyway, it or your rival`s pokemon are the only pokemon allowed to inflict damage.
I think I`ll make my hardest Scramble Ever for post 500. Coming Soon!