Hey theplottwist, don't forget to design a super battle fortress called 'Galamoth 5'.
PS I'll shake my at those who don't get the pun.
Yes, I've designed a BUNCH of crap that will never be used already (in words only).
And yes, Galamoth is a Belser-esque giant Battleship himself, with an Electric Core as the boss.
Legion is a gigantic parasitic entity covered in scrap metal and wildlife absorbed from other planets.
Zombies are degraded Belmont ships, turned against the Belmont Fleet through Crimson Particle manipulation.
Medusa Drones are swarm enemies. Small, fragile, but fast.
Fleaman are ground based crafts that leap around trying to reach the ship's height.
Death is a battleship himself composed of a giant mecha and a scythe-like weapon. Only the scythe itself is sentient, though.
Maria is an engineer, able to construct the "Detection Chip" who enables Alucard to identify the virus controlling the Richter ship.
Sypha and Grant are devices. Sypha Device is an Options-like device that shoots elemental based bombs while following the ship, while Grant Device enables the ship adhere to the terrain without exploding.
Wall Meat here is "Wall Shield" that can be found inside asteroids and battleship walls, which grants a shield to the ship. More Wall Shield makes the ship's shield more powerful.
Also, every Belmont ship is able to use the Divine Laser Whip Beam in a diferent way. For instance, Simon is able to whip/shoot in different directions, Richter is able to wiggle the laser whip around and deflect projeticles for the duration of it's Charging Bar, Trevor is able to extend the Divine Laser Whip Beam Charging Bar with powerups (but can only whip foward), Christopher's beam can shoot fireballs, etc etc
"PORTRAIT" is a ship constructed when the Belmont Fleet disappeared, by the MORRIS fleet. It is a ship that can switch between two attacking modes called "Jonathan" and "Charlotte". It's equipped with the Divine Laser Whip Beam device, but can't use it properly without finding the "Lecarde Engine" which is lost in space (In the clutches of the scientist Brauner, in fact, who in turn is infected with the Crimson Particle himself). Besides, it can only use the beam while in "Jonathan" mode. The "Charlotte" mode allows the ship to use the Charging Bar to execute powerful attacks.
"Shanoa" is a special ship designed to be able to absorb the Crimson Particle inside Dracula's fleet after destroying them, using the "DOMINUS" Probe, that is able to convert Crimson Particles to mimick their powers. The "DOMINUS" probe, once deployed, can revert the Crimson Core's flow into itself and make it implode using its stored and converted Crimson Particles. But if used anywhere else besides into the Crimson Core itself, it can create a black hole that will consume the entire galaxy. It was constructed by the ECCLESIA organization to destroy the Crimson Core, but the true goal was to make the ship become Dracula's vessel by extreme accumulation of Crimson Particles on the DOMINUS probe, and making it explode through a "malfunction", that would open a blackhole able to summon the Demon Battleship Castlevania.
"Gabriel" is a ship manufactured by a rival Space Exploration Fleet called "Mercury Fleet". The ship was built to be able to defeat Dracula faster and much more efficiently, but it was secretly infected with a Crimson Particle by infiltrated scientist Dave Alvarez, who wanted to see Dracula conquering the galaxy. The ship ends up becoming Dracula's vessel while trying to face him, after Dracula himself absorbs it by controlling it's Crimson Particle and uses it as his new host. Yeah, the "Gabriel" ship turns into "Ressurrected Crimson Core: Dracula".
The subweapons don't even need to be "translated" into a Shmup game. Holy Water being the most extreme example. Put it as a Gradius' Missile weapon, and no one will ever notice the difference. Same goes for the other weapons.
The Alucard ship, as mentioned previously, is a ship with a sentient core built by Dracula to rival the Belmont ships. However, it went rogue and turned against him (thanks to a system bug called "LISA", previously an auxiliary artificial intelligence created by Dracula to assist him in building Alucard). Alucard is able to use Familiar Drones, the Alucard Laser Spear Beam (Analogous to the Divine Laser Whip Beam), and is equipped with the Mist Device, which allows it to go transluscent temporarily. The ship makes contact with the Lecarde Union and delivers them his Alucard Laser Spear Beam device, which they eventually reverse engineer into the "Lecarde Engine", curiously constructed by Dracula with the Crimson Particle much the same way as Leon made the Divine Laser Whip Beam with the Alchemy Particle. That'd be how "PORTRAIT" would be able to unlock its DLWB, by using the technology of the Lecarde Engine.
Eric would be the ship constructed and piloted by the Lecarde Union's leader scientists Stella and Loretta, to defeat the scientist Brauner using the Lecarde Engine to generate the Alucard Laser Spear Beam. But it'd be destroyed, and Brauner would get his hands on the Lecarde Device himself, while enslaving Stella and Loretta to serve as assistants. The sisters would later use the Lecarde Engine's knowledge to unlock the DLWB on the PORTRAIT ship.