>>29053554Johto. I just did this. My team was unreal.
Scyther
Heracross
Shuckle
Fortress
Venonat
Parasect
Once you get Scyther to have Swords Dance + Slash, it's almost too easy. Parasect had spore, so I'd put them to sleep and switch out, start spamming them swords dances, and slashed through every trainer in the E4 and Red. So, hard mode would be no Swords dance.