Emerald Butterfree is Entombed by Rocks

This is going to be a running theme throughout all Pokemon games, for the record.
Glitch Pokémon in RBY (And are they Actually Good?): • Glitch Pokémon in RBY ...
Co-commentator: / @retrojam98
Thumbnail Butterfree by www.instagram....
RULES
Playing on the "third version" of every gen (Yellow, Crystal, Emerald, etc)
Butterfree only for battles (other Pokemon are allowed for HMs/TMs)
No using items on Butterfree mid-battle (X-items, potions, etc)
No accuracy lowering/evasion raising moves (Sand Attack, Double Team, etc)
Rival's starter Pokemon is always the most dangerous one (usually the fire starter)
Required to fight all bonus fights (Gym Leader/Elite 4 rematches, any extra "boss trainers")