Valis III is a poor man's Castlevania III. Which isn't an insult, honestly.
They're all painfully slow, from the player's running speed to the text scrolling.
There's something remarkably bland about the games but at the same time they have such a charm to them...it may take a while for you to understand what I mean, hell I can't even explain it.
Never played Syd of Valis. Wish I had.
Valis IV on SNES is shit. When they changed the main character, yeah, lost all interest.
Oh shit, do you like Sailor Moon?
If yes, you will like Valis.
Simple as that.