The most popular TMNT characters according to an automated online study
 

The number in parentheses corresponds to the number of unique visitors over a two-day (ot two week?) period (see site for more details). One shortcoming is that many characters such as those of the Channel 6 crew and various Dimension X creatures are ommitted as on the main Wiki they are relegated to the main "list of Teenage Mutant Ninja Turtles characters". Still, this is a good, clean "popularity study" list here.

Source:http://top-topics.thefullwiki.org/Te...les_characters

1. Shredder (1478
2. April O'Neil (1187)
3. Raphael (1138
4. Donatello (1021)
5. Leonardo (1011)
6. Michelangelo (983)
7. Casey Jones (920)
8. Splinter (772)
9. Krang (725)
10. Bebop & Rocksteady (688
11. Venus (564)
12. Cerebus (561)
13. Savage Dragon (463)
14. Karai (374)
15. Baxter Stockman (326)
16. Foot Clan (287)
17. Tokka and Rahzar (266)
18. Wild West C.O.W. Boys of Moo Mesa (237)
19. Hamato Yoshi (231)
20. Leatherhead (217)
21. Rat King (215)
22. Gizmo (24)
23. Gutwallow (17)

11. Venus (564)

LOL.

Bog isn't even a TMNT character. He's never even crossed over with them like Gutwallow has. Really odd list.

That doesn't qualify as a popularity contest in my book. Just people reading up on characters to humor their interests.

And how many of the Turtle names were people looking up the Renaissance masters?

If you click on the link, you'll see that it says "Teenage Mutant Ninja Turtles" in parentheses after each of the turtles, Casey Jones, Shredder, and Splinter. With a very few exceptions, each character on the list was done by computer calculating the number of unique viewers over a two-day period. If you don't believe me, just ignore. I just was a little lazy typing "teenage mutant ninja turtles" and it wouldn't look clean on this board. I'm removing Bog as well. Plus, some people may look at one of those painters and think "Wasn't that one of the TMNT?", and then surf to the corresponding Ninja Turtle article.

...I´m please to see that name in the list *Even*!!!! :lol:

Here's a second study using eBay searches conducted today.
 

Now, I simply entered "ninja turtles" and the character as shown below to conduct another search; this is another method in terms of overall "branding" to each character shown here. This list is incomplete and will be revised.

1. Raphael 585
2. Donatello 530
3. Leonardo 476
4. Michelangelo 435 (uses both "Michelangelo" and "Michaelangelo" combined)
5. April 319
6. Shredder 211
7. Splinter 188
8. Rocksteady 94
9. Bebop 77
10. Casey 62
11. Foot Soldier 61
12. Usagi 54
13. Ray Fillet 51
14. Baxter 47
15. Ace Duck 43
16. Leatherhead 42
17. Mondo Gecko 41
18. Fugitoid 40
19. Genghis Frog 38
20. Krang 30
T21. Rat King 29
T21. Traag 29
23. Mouser 28
24. Wingnut 27
25. Triceraton 26
T26. Pizzaface 25
T26. Tattoo (character only) 25
28. Slash 23
T29. Methalhead 21
T29. Napoleon Bonafrog 21
T29. Tokka 21
32. Rahzar 20
33. Muckman 17
34. Zak 16
T35. Mutagen Man 15
T35. Groundchuck 15
T35. Turtlebot 15
T38. Chrome Dome 14
T38. Princess Mitsu 14
T40. Hun 13
T40. Merdude 13
42. Cerebus 12
T43. Dirtbag 11
T43. Foot Gunner 11
45. Wyrm 10
46. Karai 9
T47. Foot Elite 8
T47. Vampire Succubor 8
T49. Torbin Zixx 7
T49. Guardian Ninja 7
T49. Sergeant Bananas 7
T52. Venus 5
T52. Dask 5
T52. Irma 5
T55. Vernon 4
T55. Burne 4
T55. Max Winters 4
T58. Elite Guard 3
T58. Kala 3
T58. Nobody 3
T61. Razorfist 2
T61. Stone Biter 2
T61. Mona Lisa 2
T64. Dragon Lord 1
T64. Rank Warrior 1
T64. Skummbug 1

& what exactly is that supposed to translate to?

I find that the eBay list can be helpful in terms of rarity; those listed with 5 or less are fairly hard to find; but it can show which characters have been the most COMMERCIALLY SUCCESSFUL over the franchise as well. The Dragon Warrior and Rank Warrior, while rare, may not be the best in terms of value due to the poor reception of TNM.

Wait a minute.Venus is on the list but not Mona Lisa.Ok,thats not legal.:o