Cool challenge. You will need an HM slave though, Waterfall is needed in Sevii Islands.
Predicting more or less these final sets:
Farfetch'd: Wish, Yawn, Cut, Fly.
Chansey: Wish, Sweet Scent, Softboiled, Ice Beam/Thunderbolt/Flamethrower/Seismic Toss.
Hypno: Wish, Belly Drum, Psychic, Shadow...