Were monstah
About werecheetah, in Hexen 2 (just mentioned) are werejaguar (nasty creatures). I know what they would be, but I'm quite amateur with DnD, so I'd forget a thing or two from the critter.
Aw, I'll give a try:
Werejaguar
Hit points: 5d10+9 (35hp)
Initiative: +7 (+3 dex, +4 improved initiative)
Armor Class: 19 (+3 dex, +6 natural)
Weapon: Bastard sword +5 melee, Claw +6 melee
Damage: Bastard sword 1d10+2, Claw 1d6+4
Special abilities: Invurnerability, Rage
STR 15, DEX 15, CON 17, INT ?, WIS ?, CHA 8
Climate: Warm
Appears: Alone (1), Pair (2), Group (3-6)
Alignment: Neutral or Neutral Evil
Invurnerability: The werejaguar can go invurnerable for 5 seconds any time, as many times, but it can't do anything during this time. -EDIT- Oh well, it can breathe and that sort of stuff. Primarily the make an howl. -EDIT-
Rage: As a barbarian.
Add everything I forgot.