I thought this until yesterday, when I hit a bullet, slammed X, and actually visibly noticed Mima standing still between the death and the bomb's activation.
tl;dr: There's lots of deathbomb time, but the lack of a noise accompanying a hit masks it.
I just went to see if i can activate such and i guess i managed to do it once or twice. I don't know if i did any more or less than that though because its almost impossible to see if its a deathbomb or just you managing to bomb before getting hit.
Still, even if the feature is present, its pretty useless compared to the windows games in which the deathbombing is much more reliable. At least to me. And the bombs actually do damage in that game... ooooohh i could write a book about how much superior EoSD is to PC-98 games.
But enough is enough. I have done LLS and MS on Hard as well as their extras. That's all i need to do, that's all i want to do. I'm not saying the games are bad though. That's at least not my intention to say. They are decent games alright, they just don't hold a candle to ZUN's masterpieces of EoSD, PCB, IN, MoF or SA.
In my opinion, they range below UFO as decent games but with some pretty huge, sometimes gamekilling, flaws.
Other than that, i've really got nothing more to say. Deathbombing is there but its pretty unreliable and there isn't even a sound to indicate it. And considering how horrible a lot of hitboxes in LLS and MS, imo, are i would never be able to properly test its reliability.
EDIT: Okay. Just took a look at EoSD's deathbombing. While i certainly was able to pull it off much easier in that game, i'm still not 100% consistent about it even when concentrating about doing so. Still, it might be because i'm a little tired. I dunno. Its getting late.