Doesn't even have to be a shitmon, just a Pokemon you like with changes or additions you'd like to see. You can use mine like a template if you want.

>Dusknoir
Type: Ghost
Stats: HP: 45 / Attack: 100 / Defense: 155 / Sp. Atk: 50 / Sp. Def: 155 / Speed: 45 (BST: 550)
Abilities: Soul Harvest, Pressure, Iron Fist (Hidden)
New/Updated Moves: Reaper Punch, Shadow Punch, Drain Punch, Hammer Arm, Endeavor, Power Trick

>Soul Harvest
Whenever the Pokemon knocks a target out, it steals the target's stat boosts and the HP it had before fainting.

>Iron Fist (updated)
Boosts the power of punching moves by 1/3.

>Reaper Punch
PP: 15 / Type: Ghost / Category: Physical / Power: 75 / Accuracy: 100 / Effect: User heals HP equal to 50% of damage dealt.

>Shadow Punch (updated)
PP: 15 / Type: Ghost / Category: Physical / Power: 75 / Accuracy: --- / Effect: Never misses.