I started thinking about this a while ago and did some 'research', aka I searched for -rating:s <character> and counted the pages. I started with krystal and renamon, then I looked at lucario, blaziken and a few others. It took me a while to remember my_little_pony and realize that twilight_sparkle topped them all by far. Are there any more big ones that I'm missing?

https://e621.net/tag?name=&type=4&order=count

If you want a better idea, you should place character name with Rating:Explicit or -rating:Safe in the search.
Otherwise you get every picture together and not every picture is porn simply because it might be skimpy.
On another note, I remember when folks use to call Lola Bunny like the furry queen of porn. Doesnt seem to be true at all.

Depending on what you consider "porn" I'd say sonic tops the list.

SirBrownBear said:
Depending on what you consider "porn" I'd say sonic tops the list.

nope, doesn't even top lucario (53 vs 70 rating:e), and twilight's got 131.

It kinda depends on what you'd define as "furry", If we're including ferals the top of the list would be dominated by ponies, if we're only counting anthro characters Renamon and Lucario would be at the top (if you count those as characters rather than species) followed by some ponies then Sonic, Rouge, and tails being somewhere in there then more ponies and with Judy Hopps and Krystal being somewhere at the tail end of the top 10.

wous said:
https://e621.net/tag?name=&type=4&order=count

where’s rena? <.<

masterwave said:
where’s rena? <.<

is a species tag

MyNameIsOver20charac said:
nope, doesn't even top lucario (53 vs 70 rating:e), and twilight's got 131.

I meant in more of an overall sense, not just this site.

darryus said:
renamon is a species tag

ah, okay
fictional species icee