Kupuk Fix and Tirichik
Looking through the Creature Catalog, I've noticed a number of creatures that belong in the Crypt since they have been statted by WotC already.
I also see a number of creatures not updated to 3.5 and it'd be nice to see those worked on before anything else.
In particularl, the kupuk needs updating AND fixing. No feats are listed, for an error point out.
I personally request the tirichik. I attempted to convert it myself, so here's what I have done with it so far. Play with it as you wish.
Gargantuan Magical Beast (Cold)
Hit Dice: 13d10+130 (201 hp)
Speed: 30 ft. (6 squares), climb 20 ft. (4 squares), burrow 15 ft. (3 squares)
Armor Class: 23 (-4 size, +2 Dexterity, +15 natural), touch 8, flat-footed 21
Base Attack/Grapple: +13/+36
Attack: Bite +20 melee (3d6+11)
Full Attack: Bite +20 melee (3d6+11), 2 tentacles (2d6+5)
Space/Reach: 20 ft./15 ft. (20 ft. with tentacles)
Special Attacks: Stretch attack
Special Qualities: Blindsense 120 ft., darkvision 60 ft., icewalking, immunity to cold, tremorsense 60 ft., vulnerability to fire
Saves: Fort +17, Ref +10, Will +9
Abilities: Str 32, Dex 15, Con 29, Int 4, Wis 16, Cha 10
Skills: Climb +19, Hide* +5 (+13 in snowy regions), Listen +11, Move Silently +16, Spot +11
Feats: Improved Natural Attack (bite), Improved Toughness, Improved Overrun, Iron Will, Power Attack
Environment: Cold Plains, Hills, Mountains
Organization: Solitary or pair
Challenge Rating: 10
Alignment: Chaotic Evil
Advancement: 14-26 HD (Gargantuan); 27-40 HD (Colossal)
Level Adjustment: ---
Icewalking (Ex): This ability works like the spider climb spell, but the surfaces the dragon climbs must be icy. It is always in effect.
Stretch Attack (Ex): Once every other round, the tirichik can elongate its neck and strike like a snake. This gives it a +2 bonus to its attacks, but it suffers a -2 penalty to AC until the end of its next turn, as it spends time reattaching its neck back in place.
Skills: Gains a +8 racial bonus to Listen, Hide, Move Silently, and Spot checks. In snowy regions, the bonus to Hide increases to +16.