Shout outs to SalacPert. Not a solid, every day choice for an every day team, but I like using it on specialized teams to take out walls. Blissey and Starmie will still beat you if they catch on, though. D:
Also, I think a number of things with Reflect in RBY go underrated, like Snorlax (thanks for that one, shrapn3l). Chansey is of some note as well but I'm not sure how I feel about losing either Thunder Wave or Thunderbolt.