First Appearence of Ryoko?

This morning, I was poking around the internet, and I stumbled across this fact/opinion:

Ryoko's first appearance in anime was actually a single frame in episode 126 of Ranma ½.

Click to expand...

So, I started digging. If Wikipedia is correct, then that means that Ryoko, or perhaps an inspiration for Ryoko's appearance is somewhere in Season 7, Episode 7, "Run Away With Me, Ranma!". However, Wikipedia is a bit confusing here, because I looked a second time, and there's a second column of really high episode numbers, that's NOT in sequential order. If I'm looking for episode 126 there, then I need to watch Season 6, Episode 11, "A Cold Day in Furinkan" to try to find this single frame of Ryoko.

Ranma 1/2 was the first anime I watched (beyond Vampire Hunter D, I believe, and I remember watching seasons 1, 2, and 6, before I fell head over heels for Tenchi Muyo! It's possible that I wouldn't have seen Ryoko's image if she was included in Season 6, because I didn't know about Ryoko while I was obsessed with Ranma 1/2.

Looks like I'm going to have to watch some Ranma! Just so I can find a needle in a haystack. Yup, I'm crazy...