I know I love it! Between the puns, the creativity, and the silliness, it's great! As for who else we could have in CV? I don't have many ideas...but the thought makes me wish someone would make a similar video with a Castlevania story! As far as a few ideas off the top of my head:
If it would have to be from the "...of Sorrow" games (since we only know of Alucard using the moniker "Arikado" in those titles):
I guess Hammer could be...a hammer. Or ham.
Yoko could be an egg named "Yolko"
If there were a bunch of Zombies, they could be "Zom-peas"
"Frank"-enstein could be a hot dog (although he's really Frankenstein's monster. I don't remember how he's labeled in the Sorrow games.)
If you branched out to other characters in other games:
Juste could be some kind of "Juice"
Cornell could be "Corn-ell"
Not many others come to mind. I have no idea what you could do for Dracula or Death, both of whom are pretty important characters in the series. You got any ideas Shiroi? Or anyone else for that matter?