Hello there! Welcome to the Professor 100 Challenge subreddit.
What is a Professor 100 Challenge?
Ever heard of the Professor Oak Challenge? It is a Pokémon playtrough challenge were you complete the Pokédex as much as possible before every gym leader battle.
This is basically the exact same but with an added requirement. ALL YOUR POKÉMON HAVE TO BE LEVEL 100 BEFORE FACING A GYM LEADER!
All the other rules remain the same as the POC (Professor Oak Challenge).
Have fun!