Alright, so here's another Greninja match:
https://www.youtube.com/watch?v=rZHUv5usE5c
However, at 1:24, something interesting happens. Kirby Fthrows Greninja at 25%, and
immediately, Greninja Shadow Sneaks out of it. Like, immediately. I'm not even sure that I can see him in a damage animation. I didn't see Hbox ever use Kirby's Fthrow in the Invitational, so maybe Kirby's Fthrow's just terrible? I do remember a yellow Fthrow from Oli in Brawl had literally no hitstun, so it might be a similar thing. Regardless, it'd be interesting if Shadow Sneak may negate hitstun with the drawback that it's really laggy at the end. Although, if I had to guess, it's just Kirby's Fthrow being bad or is something the team is gonna patch.