My final smash idea is ready, been piecing it together in my head all week. Feel free to add it to my moveset spoiler:
Final Smash - Danger Cannon: A large cannon rises from the bottom of the screen until the operational section's base rests just above the stage in the background. The sound it makes is that of the cannon's emergence in Super Mario 64 but, make no mistake, this is not that cannon. This cannon's appearance is styled after those in the multiplayer of various games such as Bomberman Generations. Once it has fully risen, Bomberman will hop stylishly from the stage into the turret seat, then angling it up towards the top of the screen and every bomb he has placed will go off immediately. From here, the player may control the crosshair's left/right location before pressing any button to shoot. This will launch two middle-sized bombs in rapid succession, only for them to combine at the top of their arc into a Dangerous Bomb. This is a bomb roughly 4.5 times the diameter of Bomberman's standard bombs with a skull across the front and it falls slowly indeed. On the off chance that it collides with a player, they will take medium damage and huge knockback. More importantly, though, the eye sockets of the bomb will glow when it makes contact with the stage, signalling the imminent explosion. When this happens, a pulse of fire about 1.5 Bomberman widths long and 0.8 widths wide will be sent out in all 4 directions from the middle of the bomb, trailing an aftereffect in the air and shooting out a new pulse at a right angle to the first approximately once every stagebuilder block width. Note that these new pulses will not spawn more since to do so would be unnecessary to produce the desired crosshatched pattern of a traditional Bomberman level. These pulses don't move too fast but they're faster than the bomb was and will change play across the entire stage when in effect. If a player is hit by them, they will take massive damage and medium knockback in the direction of the pulse, making sure they are lined up to be hit by it again and potentially pushing them all the way past the stage's blast zones. Once all the fire pulses have cleared the screen, the afterimage fades away and Bomberman hops back to his previous position on the stage, cannon sinking back down behind him.