About Boon Marrabbio...

[Rose]

A shadowy figure throwing knifes, is that... DIO?!

[Darth Zed]

It's a reference to noob saibot from mortal kombat, you unlock him by removing the skull and heart from the map, much like many fatalities remove skulls and hearts.

his passive of incredibly slow projectiles is a reference to matrix bullet time, and is even referred to as NEO in the code.

idk what game/movie the dio youre talking about is from specifically, most of the references in the game are from the 90's, with 16 bit era to early ps2/xbox era. with the exception of bayonetta

[Rose]

Originally posted by Darth Zed:

It's a reference to noob saibot from mortal kombat, you unlock him by removing the skull and heart from the map, much like many fatalities remove skulls and hearts.

his passive of incredibly slow projectiles is a reference to matrix bullet time, and is even referred to as NEO in the code.

idk what game/movie the dio youre talking about is from specifically, most of the references in the game are from the 90's, with 16 bit era to early ps2/xbox era. with the exception of bayonetta

Ah thanks for the reference! Didn't realize Boon backwards is Noob

I meant it as a joke but DIO is from Jojo's Bizzare Adventure, he appearead as a shadowy figure in part 3 and throws knifes as a weapon, he can also stop time to suspend lots of knife in the air, hence the similiarity

[Julius Seizure]

Originally posted by Darth Zed:

It's a reference to noob saibot from mortal kombat, you unlock him by removing the skull and heart from the map, much like many fatalities remove skulls and hearts.

his passive of incredibly slow projectiles is a reference to matrix bullet time, and is even referred to as NEO in the code.

idk what game/movie the dio youre talking about is from specifically, most of the references in the game are from the 90's, with 16 bit era to early ps2/xbox era. with the exception of bayonetta

It's a reference to the vampire Dio Brando, otherwise known as DIO, from the manga Jojo's Bizarre Adventure. Dio eventually gains the ability to stop time around himself for brief periods, and famously used an attack where he stopped time, threw dozens of knives, then resumed time so they all went flying at once.

Boon doesn't quite fit the paradigm since he has no way to instantly accelerate the knives, but it's not an unreasonable comparison.

[Jaeus]

I would assume it is intended as a reference to both.
Literally being Boon backwards = Noob backwards = Boon again for Ed Boon from Mortal Kombat, being an all-black shadow palette swap, is 100% Noob Saibot.
But like you say, his functionality may be a literal Jojo reference... to a vampire... in a game called Vampire Survivors. ;D

[Erin the Angry]

Stacking projectile speed makes the knives go faster in gameplay so maybe you can use bracer, box and chaos in the dark night to make some crazy accelerating knives.

[Rose]

I forgot that DIO is literally a vampire too dang