>>57209119>>57209242>>57209763>Over 10k ClubLucario (30.8k), Gardevoir (19.7k), Umbreon (18.6k), Pikachu (18.4k), Eevee (17.6k), Sylveon (15.0k), Lopunny (14.7k), Vaporeon (14.1k), Braixen (13.5k), Glaceon (12.2k), Zoroark (11.6k), and Charizard (10.9k)
>Biggest FurbaitLucario wins with a landslide >30k images, over 10k more than Gardevoir. But keep in mind that this is all sourced from e621, which caters to furry/anthro/feral more than a general audience and is not exclusively pornographic. Other sites may represent different audiences, such as
rule34.xxx, where Lucario and Gardevoir are virtually tied at ~29.4k pornographic images each.
Eevee and the Eeveelutions are by far the most popular line of Pokémon, with 5 in the top 10 slots and all 9 in the top 25. Adding up their individual totals comes out to an incredible 97k images, almost 20% of all Pokémon images (522k) on the site. In reality, they're often paired together and there's considerable overlap, but combining the "eeveelution" tag and all images of Eevee excluding those still nets a total of roughly 83k images, about 16% of all Pokémon images and more than most entire Generations of Pokémon except Gen 1 (150k), 4 (110k) and 3 (86k).
Honorable mention to Lycanroc which surprised me with 9k total images, though each form qualified individually on the chart (Midnight 6.1k, Midday 1.7k, and Dusk 1.1k).
The most popular Mega Evolution is unsurprisingly Mega Lopunny, with 1.8k images. The most popular regional variant is Alolan Vulpix with 3.1k images, and is also the only alternate form to be more popular than the original, with about twice as many images as Vulpix (1.4k).
The most popular Pokémon to not make the cut was ironically Victini, with 993 images.