The normal route gets 6 vitamins, without new manips you can skip 5 of those and save about 4 minutes with added battle tower risk

Pros
  -skip kenya
  -skip egg deposit
  -skip mt mortar pp up
  -skip giving away kenya
  -skip entire goldenrod trip
  -get quick claw early is faster
  -skip violet pp up(must grab violet rare candy)
  -skip selling items
  -skip using 5 extra vitamins
  -skip burnt tower hp up

Cons
  -must let togepi hatch
  -wobbufet takes more damage from everything 
  -arcanine can use all of its moves instead of locking into flamethrower on wobbufet