So let's not talk about anything Marth for the 100th time (I know it's going to happen sooner or later) and talk about something that is actually refreshing, even for frame data.
Perhaps we talk about Marth because you know, he's actually good/consistent and gets strong results, unlike other characters? ¯\_(ツ)_/¯
About this dash bomb throw, is there any real benefit of using it over a jump cancel throw (or glide toss, whatever the actual term is) though? Like, the endlag might be less, but a jump cancel throw will grant you extra distance, right? Surely the little slide you get will be more beneficial in most situations (creating openings for combos etc).
I don't know the frame data of Toon Link's throws like this, but if say, his standard bomb throw had a couple less frames start up or endlag, I'm pretty sure in most situations, the jump cancel throw would still be the far superior throw.
I get what you're saying though; if Link has a bomb in hand, a dash throw at close range
might be handy in certain situations to allow him to beat a quick option of another character.
What's the first frame you can throw in a dash; is it frame 1? That would technically make the throw frame 5, wouldn't it (dash for 1 frame + frame 4 throw = frame 5 option)? That would still be Link's fastest ground option, though.
But hey, if we are talking about good/fast close quarters options... Marth has essentially a frame 1 move for close quarters combat; Dolphin Slash (it's frame 5, but aerial, has frame 1-5 intangibility, so it's basically a frame 1 combo breaker. Could be considered frame 4 on the ground, being still a frame 5 move but grounded intangibility is 4-5).
Isn't Marth fun to talk about?
Actually, that brings me to another point - what other specials grant intangibility that essentially make them better in close quarters? I know Mario's Super Jump Punch does, for example (intangibility frames 3-6, hitbox starts on frame 5), but he does have Jab which is frame 2, and even in the air, Nair is also frame 3, so it's not quite as useful.
And by extension, which characters could noticabley benefit from something like this without being too strong? Like, if Link had a frame 3 intangible Up Special, that would be quite threatening considering it's grounded KO potential. Ganondorf, with something like this, would benefit quite a lot from it, potentially allowing him to escape certain combos or even counterattack, and boost his overall quite lacking OoS game a little.