What CAN be revamped:
- Movesets (TMs and levelsets) - For TMs, please post the existing list even if you're making no changes, it makes my job much easier.
- Abilities
- Egg Moves (POST WITH FATHERS, PLEASE)

What CANNOT be revamped:
- Base stats

We're doing Duskull -> Dusclops in this topic.
Gen 3 info:

http://www.serebii.net/pokedex-rs/355.shtml
http://www.serebii.net/pokedex-rs/356.shtml

Aaaaand here's my first attempt at a levelset:

Move/Duskull/Dusclops

Leer/-/-
Night Shade/-/-
Disable/5/5
Foresight/12/12
Astonish/15/15
Confuse Ray/21/21
Doom Scythe/26/26
Pursuit/30/30
Curse/36/36
Soul Burn/x/37
Shadow Punch/x/37
Will-O-Wisp/40/42
Mean Look/46/49
Umbrage/50/55
Marionette/x/61

Additions to the movepool were Doom Scythe, Soul Burn, Umbrage, and Marionette. Future Sight and Bind were removed, and levels were adjusted slightly.