You know what would be a neat idea, what if bomberman had a line bomb move as a
chargeable DOWN-B special
Just HOLD the down-b (which is also the bomb drop move) let the "hng!" audio clip play and let him do a charging animation as charges up his move and probably have a little HUD above or below him showing how much bombs he's about to release at the same time (optional), when he releases the bombs he spread his arms like the image above, the longer you charge, the more amount of bombs you spawn at the same time.
And one more thing, and it might not be a great idea, what if his explosions be "+" like, exploding outwards just to give the hotbox a bit of reach (using only 3d elements)
Or
Have the explosion animation like in Saturn bomberman, similar to the x-bomb in sm4sh
And the explosion will be "+" shaped into the air like in pocket bomberman
I already knew his own explosions can hurt bomberman as well so idk if it's a great choice.
[Edit] The "+" shaped explosions can be good for bomb chains when you set up a certain amount of bombs in a strategic way
And when pumping the bomb, the fire length of the explosion should slightly increase
I'm just suggesting