Krazy was my first instinct and I did an image search last night and the ears helped really sell it for me, they're pretty distinctive.
Answers http://caanantheartboy.deviantart.com/art/Catwoman-the-cat-lady-366059367 1. Cheshire Cat (Alice in Wonderland) 2. Krazy Kat (Krazy Kat) I thought it was Hobbes (Calvin & Hobbes) 3. Azrael (Smurfs) 4. Streaky (DC comics) 5. Scratchy (The Simpsons) 6. Horse (Footrot Flats) 7. Felix (Felix the Cat) 8. Bill the Cat (Opus comic strip) 9. Mooch (Mutts comic strip) 10. Bucky Katt (Get Fuzzy comic strip) 11. Thomas O'Malley(Aristocats) 12. Figaro (Pinocchio) 13. Penelope Pussycat(Looney Tunes) 14. Marie (Aristocats) 15. Dr Claw's MAD cat (Inspector Gadget) 15a. Hello Kitty doll (Hello Kitty) 16. Stimpy (Red & Stimpy) 17. Puss in Boots (Puss in Boots / Shrek films) 18. Garfield (Garfield comic strip) 19. Mr Kat (Kid vs Kat) 20. Sylvester the cat (Looney Tunes) 21. Simon's Cat (http://www.youtube.com/user/simonscat) 22. Top Cat (Top Cat) 23. Tom (Tom & Jerry) with a ripped up toy Jerry 24. Nermal (Garfield comic strip) 25. Snowball II (The Simpsons) 26. Catwoman (DC comis) Thanks to all for playing along.