I've been Up-Bing OoS with Kirby since 2009.
Guess I do that cause I play MK, but I space it with Kirby, it's actually REALLY good, it catches people offguard, but it's good for like once or twice a match, if it's read, it's a heavy punish.
Another tip I'll give to Kirbys (I dunno if Kirbys do this, but I don't see it very often... But then again, I don't watch Kirby vids that often), use rapid jab to beat spotdodges, it's SOOOOOOOOOOOO GOOD. Like, if you try to grab someone and you miss cause they spotdodge, if you feel you can't read how many times (or if you can read them, but just not time the punish, timing spotdodge punishes can be tricky) they're gonna spotdodge (cause people do that a lot now, it's not even a habit, it's just good, M2K and ZeRo do it a lot) just start your rapid jab, it'll beat them if they try to spotdodge mindgame you. This is good against people who try to spotdodge mindgame you into grab (or a tilt, or any fast move really), notably on characters like Wario or Snake. Just make sure you look at how they're DIing and cancel your rapid jab fast enough. Like if you do it against Snake but don't cancel it fast enough, they can f-tilt you for 21%, so even if you get some jabs, they're only 1% each hit, so you lose that scenario. I also like doing it vs spotdodging Falcos cause they like to spotdodge to jab a lot.
Sorry if this is old news, but I haven't seen anyone talk about it, but I think it's REALLY good.