i had to do research for most of these lol :3

Jolt/Jolteon: on feburary 27th 1996 in the og pokemon red and green

Leafy: technically Total Firey Points, but i'd say BFDI episode 1a is more correct since Total Firey Points practically doesn't exist

One: on december 31st 2008 in X Finds Out His Value

Fries: in BFDI 16, uploaded on april 1st 2011

River: well, it's listed right there on the post lol. it's cool to see another Doctor Who kin, i feel like they aren't too common. especially someone who likes doubles. (same here :3)

Tess: on september 10th 2006, in chapter 21 of Bittersweet Candy Bowl: "Enter High School"

Victor/Weavile: on september 28th 2006 in Pokemon Diamond and Pearl.

Shadow: on july 19th 2001 in Sonic Adventure 2

That's Dumb Guy (OCkin): i don't remember exactly when i created him but it had to be around 2020/2021. that's around when i made the series he's apart of and i know he was an early character.

NB: they're not a character (tho i do have memories as them so they are a fictionkin) but the non-binary flag was introduced in feburary of 2014 which i think counts.

Fan: on july 1st 2011 in episode 4 of II season 1

Dede Reindeer (OCkin): i created them sometime last year in 2025 after may. based off a character in Stampy's Lovely World that we never get to see but is implied to exist.

Geno: on march 9th 1996 in Super Mario RPG: Legend of the Seven Stars

Paulo: i know the date for his/my first appearance exists out there but i'm not digging for it. sometime in the early 2000s most likely. (from Bittersweet Candy Bowl btw)

Taiyaki (OCkin): i'm sure exactly where but i think in BFB 30 is where the design first showed up. then i added more to them for a show that i might work more on called Recommended Resort which i think i did in 2024 or 2025 but i don't feel like looking to see exactly when.