Here's one.
Great Wyrm Brass Dragon
Gargantuan Dragon (Fire)
Hit Dice: 37d12+296 (536 hp)
Initiative: +4
Speed: 60 ft., burrow 30 ft., fly 250 ft. (clumsy)
Armor Class: 42 (-4 size, +36 natural), touch 6, flat-footed 42
Base Attack/Grapple: +37/+62
Attack: Bite +47 (4d6+13) melee
Full Attack: Bite +47 (4d6+13) melee, 2 Claws +47 (2d8+6) melee, 2 Wings +46 (2d6+6) melee, Tail Slap +46 (2d8+19) melee
Space/Reach: 20 ft./15 ft. (20 ft. with bite)
Special Attacks: Breath weapon (60 ft. cone of sleep or 120 ft. line of fire 12d6, DC 36), crush 4d6+19 (DC 36), frightful presence (DC 33), tail sweep 2d6+19 (DC 36)
Special Qualities: Blindsense 60 ft., control weather, control winds, damage reduction 20/magic, darkvision 120 ft., endure elements, immunity to fire, immunity to sleep and paralysis, keen senses, speak with animals, spell resistance 30, spells (caster level 19th), suggestion, summon djinni, vulnerability to cold
Saves: Fort +28, Ref +20, Will +25
Abilities: Str 37, Dex 10, Con 27, Int 20, Wis 21, Cha 20
Skills: Bluff +33, Concentration +36, Diplomacy +33, Escape Artist +28, Gather Information +33, Intimidate +33, Knowledge (any 2) +45, Listen +47, Search +45, Sense Motive +33, Spot +47, Survival +33, Use Magic Device +33
Feats: Alertness, Blind-Fight, Cleave, Empower Spell, Flyby Attack, Hover, Improved Initiative, Maximize Spell, Power Attack, Snatch, Weapon Focus (bite), Weapon Focus (claw), Wingover
Environment: Warm deserts
Organization: Solitary, pair, or family (1-2 and 2-5 offspring)
Challenge Rating: 23
Treasure: Triple standard
Alignment: Always chaotic good
Advancement: 38+ HD (Gargantuan)
Level Adjustment: -
Spells Known (CL 19th, +33 ranged touch, save DC 15 + spell level)
9th (4/day)--foresight, weird (DC 24)
8th (6/day)--cloak of chaos, discern location, prismatic wall (DC 23)
7th (6/day)--legend lore, plane shift (DC 22), word of chaos (DC 22)
6th (6/day)--acid fog, find the path, greater dispel magic
5th (7/day)--dispel law (DC 20), feeblemind (DC 20), Rary’s telepathic bond, true seeing
4th (7/day)--chaos hammer (DC 19), charm monster (DC 19), detect scrying, divination
3rd (7/day)--clairaudience/clairvoyance, haste, magic circle against law, protection from energy
2nd (7/day)--blur, detect thoughts (DC 17), fog cloud, invisibility, shatter (DC 17)
1st (8/day)--expeditious retreat, mage armor, magic missile, shield, true strike
0 (6/day)--arcane mark, dancing lights, daze (DC 15), detect magic, flare (DC 15), ghost sound (DC 15), mage hand, prestidigitation, read magic