well GitP seemed endeared towards the Catzilla so I'm working on it to. Might as well show what I have done here as well:
GO GO CATZILLA! "REEEEEAAAWWWWWRRRRRR!" You are one damn big cat. Kept and pampered only by the richest men in the world you are also the melee strongarm of the Cat Burglar Guilds. When cities need taught a lesson they call you. You're also helpful to have around should the Tarrasque pay a visit.
BECOMING A CATZILLA Traditionally only a few Big Kitties become Catzillas, as there are even fewer rich nuts capable of feeding and maintaining a Catzilla than there are Big Kitties.
ENTRY REQUIREMENTS Class Abilities: Fat Cat
Skills: Bluff 8 ranks, Intimidate 25 Ranks, Knowledge (Local) 8 ranks, Listen 8 ranks
BAB: +16
Feats: Big Cat on the Block, Big Paw, Extra Biggie Sized, Fwuffy, Smite Mousie, Tomcat
Epic Feats: Epic Tomcat
Class Skills The Catzilla's class skills (and the key ability for each skill) are Bluff (Cha), Climb (Str), Intimidate (Cha), Jump (Str), Knowledge (Geography, Local, Nature, Nobility)(Int), Listen (Wis), Search (Int), Spot (Wis), and Use Magic Device (Cha)
Skills Points at Each Level : 4 + int
Hit Dice: d10
1. Kitty Form (Huge)
2. Awe
3. Kitty Form (Spell Resistance)
4. Enhanced Kitty Form (Medium)
5. Kitty Form (Gargantuan)
6. Size Has It's Advantages
7. Kitty Form (Spell Resistance)
8. Enhanced Kitty Form (Large)
9. Kitty Form (Colossal)
10. Enhanced Kitty Form (Huge)
Weapon Proficiencies: Catzillas gain no new weapon or armor proficiencies.
Kitty Form (Su): At 1st level you may now assume Huge Kitty Form. You get +12 Str, +8 Con, and a +8 Natural Armor Bonus. You claw attacks now do 1d8, and your bite does 2d6. You also have a -2 Size Penalty to AC and Attack Rolls, a -8 Size Penalty to Hide Checks, and a +8 Size Bonus to Bull Rush, Grapple, Overrun, and Trip Checks. Space/Reach is now 15'/10'. All Kitty Forms Huge or Larger last 3 rounds plus 1 round per point of Charisma modifier. You may use them a number of times per day equal to half your Catzilla levels, rounded up.
At 3rd level your Spell Resistance extends to include any 2 spell schools (i.e. Divination, Enchantment, Transmutation, etc.)
At 5th level you now gain Gargantuan Kitty Form. You get +20 Str, +12 Con, and a +10 Natural Armor Bonus. Your claw attacks do 2d6, and your bite now does 2d8. You also have a -4 Size Penalty to AC and Attack Rolls, a -12 Size Penalty to Hide Checks, and a +12 Size Bonus to Bull Rush, Grapple, Overrun, and Trip Checks. Space/Reach is now 20'/15'.
At 7th level your Spell Resistance includes any 2 more spell schools.
At 9th level you now gain Colossal Kitty Form. You get +28 Str, +16 Con, and a +12 Natural Armor Bonus. Your claw attack do 2d8 and your bite does 4d6. You also have a -8 Size Penalty to AC and Attack Rolls, a -16 Size Penalty to Hide Checks, and a +16 Size Bonus to Bull Rush, Grapple, Overrun, and Trip Checks. Space/Reach is now 30'/20'.
Awe (Ex): While in Big Kitty Form you gain a certain majesty (or at least a certain 'what the hell is that' factor). Any living thing within 120' that can see you must make a Willpower Save (DC is 10 plus half Hit Dice plus Charisma Modifier plus an additional +2 for each Size Class bigger than your opponent you happen to be) or be Fascinated for 2d6 rounds. If the Save is successful they are immune to this Catzillas Awe for 24 hours (or until he attacks). Once you attack a second Save must be made (Same DC, but the opponent gets a +2 Bonus to his Save if he succeeded in Saving against Fascination) or the opponent is Frightened for 2d6 rounds. If the Save is successful the opponent is immune to this Catzillas Awe for 24 hours.
Enhanced Kitty Form (Su) At 4th level you may now assume Medium Kitty Form at will.
At 8th level you may now assume Large/Big Boned Kitty Form at will.
At 10th level you may now assume Huge Kitty Form at will.
Size Has It's Advantages (Ex): At Level 6 you gin several combat maneuvers related to your size:
Swat the Birdie: When you make a successful claw attack against a flying opponent at least 1 Size Class smaller than you, it must make a Reflex Save (Save DC is 10 plus half Hit Dice plus Dexterity Modifier), or be knocked from the sky and take falling damage. If you use this maneuver as part of an Attack of opportunity the Save DC gets a +4 Bonus.
Swat the Mousie: If you succeed in making a Claw Attack against an opponent at least 2 Size Classes smaller than you, it must make a Reflex Save (Save DC is 10 plus half Hit Dice plus Strength Modifier) or be knocked 10 ft. back from the Catzilla (and land prone).
Pounce: When making a Charge Attack you may slam into an opponent with all your body weight. Damage depends on your Size: Huge (8d6 plus double Strength Modifier), Gargantuan (12d6 plus double Strength Modifier), and Colossal (16d6 plus double Strength Modifier).
PLAYING A CATZILLA You are among the worlds biggest of Kitties. People fear you. Well some do. Small children think your the fluffiest thing ever. And little old ladies seem to put out bowls of milk you can barely see let alone drink from. But most of the rest of them fear you. At least you keep telling yourself that.
Combat:Combat for Catzillas usually includes walking leisurely up to your target and smooshing him with a decisive paw swat. Occasionally you need to make a second swat as some of the little ant people think they're tuff, but they're few and far between.
Advancement: Catzillas are often Guild Leaders hiding in plain sight as a local tourist attraction. This makes advancement a little odd, as you need to match the needs of your Guild with your "owners" desire to train you to do tricks for the public.
Resources: Much like the Big Kitties, you probably head a Cat Burglars Guild. A pretty good sized one in your case. People are often surprised by how many regular sized cats like to hang out around you.
CATZILLAS IN THE WORLD "AAAAAAAAAAAAAAAHHHHHHHHHHHH!!!!!!!!!!!! Oh wait, is that just a giant cat? What the hell am I screaming for? What's a cat gonna do?" You're too big for cages now. But you still act like a pampered pet. And you occasionally go on a rampage and attack a city to maintain your rep. Or to take out rivals or a specific target.
Daily Life: You live the life of luxury, fed and scrubbed daily. And you get to whup the occasional city cause you're a pet who doesn't know any better and Missus Megalomania wuvs you.
Notables: The Great Poofy (CG Male Human Cat Burglar 8/Big Kitty 10/Barbarian 2/Epic Big Kitty 4/Catzilla 1) is a local attraction. People come from miles around to see him. He seems particularly fond of gullible Clerics with money.
Organizations: You pretty much are your own organization.
NPC Reaction PC's tend to love or hate you. There's little middle ground because you're pretty famous, and you have that certain "oooooohhh" factor. You change back to normal from Kitty Form to hide now and then because you're so famous.
CATZILLAS IN THE GAME This will be an odd class for a PC. After all everyone for miles away will know you in Kitty Form. And even if you change to look like a different one you'll have to avoid being big most of the time. After all who wants 2 or more Catzillas running around.
Adaptation: This one is definitely for silly campaigns. Can't imagine how you'd put it in a serious campaign.
Encounters: PC's will usually be gawkers waiting in line to see the Great Poofy. Or perhaps be assigned to capture you and bring you back when you 'escape'.
Sample Encounter EL 12: The PC's are enjoying their day off at a local nobleman's private zoo, when they see the prize of his collection: a kitty the size of a large house (maybe a small castle). He seems to like the party Cleric, and purrs mightily while rubbing against him. Later, the party Cleric notices his coinpurse missing.
How the hell does a giant cat learn to pick pockets?
The Great PoofyCG Male Human Cat Burglar 8/Big Kitty 10/Barbarian 2/Epic Big Kitty 4/Catzilla 1
Init +2 (+4 Small, +5 Tiny, +6 Diminutive),
Senses: Listen +10, Spot +10, Low Light Vision and Scent in Kitty Form
Languages Common
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AC 31, touch 20, flat-footed 29 (+2 Dex, +7 Protection, +11 Armor)
AC Raging 29, touch 18, flat-footed 27 (-2 Rage, +2 Dex, +7 Protection, +11 Armor)
AC Small 33, touch 22, flat-footed 29 (+1 Size, +4 Dex, +7 Protection, +11 Armor)
AC Small Raging 31, touch 20, flat-footed 27 (-2 Rage, +1 Size, +4 Dex, +7 Protection, +11 Armor)
AC Tiny 35, touch 24, flat-footed 30 (+2 Size, +5 Dex, +7 Protection, +11 Armor)
AC Tiny Raging 33, touch 22, flat-footed 28 (-2 Rage, +2 Size, +5 Dex, +7 Protection, +11 Armor)
AC Diminutive 38, touch 27, flat-footed 32 (+4 Size, +6 Dex, +7 Protection, +11 Armor)
AC Diminutive Raging 36, touch 25, flat-footed 30 (-2 Rage, +4 Size, +6 Dex, +7 Protection, +11 Armor)
AC Medium 31, touch 19, flat-footed 29 (+2 Dex, +1 Natural, +7 Protection, +11 Armor)
AC Medium Raging 29, touch 17, flat-footed 27 (-2 Rage, +2 Dex, +1 Natural, +7 Protection, +11 Armor)
AC Large 32, touch 18, flat-footed 30 (-1 Size, +2 Dex, +3 Natural, +7 Protection, +11 Armor)
AC Large Raging 30, touch 16, flat-footed 28 (-2 Rage, -1 Size, +2 Dex, +3 Natural, +7 Protection, +11 Armor)
AC Big-Boned 34, touch 18, flat-footed 32 (-1 Size, +2 Dex, +5 Natural, +7 Protection, +11 Armor)
AC Big-Boned Raging 32, touch 16, flat-footed 30 (-2 Rage, -1 Size, +2 Dex, +5 Natural, +7 Protection, +11 Armor)
AC Huge 36, touch 17, flat-footed 34 (-2 Size, +2 Dex, +8 Natural, +7 Protection, +11 Armor)
AC Huge Raging 34, touch 15, flat-footed 32 (-2 Rage, -2 Size, +2 Dex, +8 Natural, +7 Protection, +11 Armor)
hp 166 (20 HD), 208 large, 249 big boned, 270 Huge
hp Raging 206 (20 HD), 248 large, 289 big boned, 310 Huge
Fort +16 (+17 Large, +19 Big-Boned, +20 Huge),
Ref +13 (+15 Small, +16 Tiny, +17 Diminutive),
Will +7 (+9 Raging)
Fort Raging +18 (+20 Large, +21 Big-Boned, +22 Huge)
Uncanny Dodge, Improved Uncanny Dodge, Evasion
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Speed 40 ft. (8 squares)
Melee Melee Small 2 Claws +19 melee (1d3+1) and 1 Bite +19 melee (1d4)
Melee Small Raging 2 Claws +21 melee (1d3+3) and 1 Bite +21 melee (1d4+1)
Melee Tiny 2 Claws +18 melee (1d2) and 1 Bite +18 melee (1d3)
Melee Tiny Raging 2 Claws +20 melee (1d2+2) and 1 Bite +20 melee (1d3+1)
Melee Diminutive 2 Claws +17 melee (1 point) and 1 Bite +17 melee (1d2-1)
Melee Diminutive Raging 2 Claws +19 melee (2 points) and 1 Bite +19 melee (1d2)
Melee Medium 2 Claws +21 melee (1d4+3) and 1 Bite +21 melee (1d6+1)
Melee Medium Raging 2 Claws +23 (1d4+5) melee and 1 Bite +23 melee (1d6+2)
Melee Large 2 Claws +23 melee (1d6+5) and 1 Bite +23 melee (1d8+2)
Melee Large Raging 2 Claws +25 melee (1d6+7) and 1 Bite +25 melee (1d8+3)
Melee Big-Boned 2 Claws +24 melee (1d6+6) and 1 Bite +24 melee (1d8+3)
Melee Big-Boned Raging 2 Claws +26 melee (1d6+8) and 1 Bite +26 melee (1d8+4)
Melee Huge 2 Claws +25 melee (1d8+9) and 1 Bite +25 melee (2d6+4)
Melee Huge Raging 2 Claws +27 melee (1d8+11) and 1 Bite +27 melee (2d6+5)
Base Atk +18,
Grp +21 (+19 Small, +18 Tiny, +15 Diminutive, +27 Large, +32 Big-Boned, +39 Huge)
Grp Raging +24 (+22 Small, +21 Tiny, +20 Diminutive, +30 Large, +35 Big-Boned, +42 Huge)
Atk Options +2d6 Sneak Attack, Rage 1/day, Large Kitty Form 3/day
Combat Gear 3 Atomic Fish Bombs
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Abilities Str 16 (20 Raging), Dex 14, Con 14 (18 Raging), Int 10, Wis 10, Cha 14
Abilities Small Str 12 (16 Raging), Dex 18, Con 14 (18 Raging)
Abilities Tiny Str 10 (14 Raging), Dex 20, Con 14 (18 Raging)
Abilities Diminutive Str 8 (12 Raging), Dex 22, Con 14 (18 Raging)
Abilities Medium Str 16 (20 Raging), Dex 14, Con 14 (18 Raging)
Abilities Large Str 20 (24 Raging), Con 18 (22 Raging)
Abilities Big-Boned Str 22 (26 Raging), Con 20 (24 Raging)
Abilities Huge Str 28 (32 Raging), Dex 14, Con 22 (26 Raging)
SQ Purr, Trapfinding, Kitty Form, SR 22, Pounce, Rake, Improved Grab, Fat Cat, Fast Movement
Feats Cattitude, Improved Toughness, Big Cat on the Block, Big Paw, Extra Biggie Sized, Epic Tomcat, Fwuffy, Jibba Jabba, Power Attack, Smite Mousie, Tiger's Rage, Tomcat, Improved Multiattack (B), Mighty Roar (B), Multiattack (B)
Skills Bluff +10, Climb +11 (+16 Small, +17 Tiny, +18 Diminutive, +15 Medium, +17 Large, +18 Big-Boned, +21 Huge), Diplomacy +6, Disable Device +4, Gather Information +6, Hide +6 (+16 Small, +21 Tiny, +25 Diminutive, +10 Medium, +6 Large or Big-Boned, +2 Huge), Intimidate +28, Jump +11 (+17 Small, +16 Tiny, +15 Diminutive, +19 Medium, +21 Large, +22 Big-Boned, +25 Huge), Knowledge (Local, Nobility) +11, Listen +10, Move Silently +6 (+12 Small, +13 Tiny, +14 Diminutive), Open Lock +10, Search +8, Sense Motive +4, Spot +10, Tumble +4, Use Magic Device +10
Possessions +7 Ring of Protection, +9 Leather Collar Armor, +5 Scratching Post, 3 Atomic Fish Bombs, Ring of Vanishing, Boots of Levitation, 1290 GP