
Well I believe I can clear this little question up.
My name is Steve Krikorian, I am the creator of Sasha Belmont.
I just got an email from nicoduches who got my address from Jorge. I must say I am absolutely FLOORED that people still remember Sasha and the Dark Abyss story!
Floored and flattered beyond reason.
So unfortunately, the crux of the matter is that there never has been a game with Sasha in it. I tried really hard about 10 years ago to make this happen, but these fan projects always fall apart. The screen shots you guys are referring to are just pics that I made. (That one someone posted of Sasha and Alucard was from the Dark Abyss fan fic, not CVO.) I do have full sprite sheets for Sasha, but he has never been in an actual game, homebrew or otherwise.
I may still have the text nicoduches is referring to at home (I can look) for the Dark Abyss script. I absolutely have all of thegraphics I did though.
Perhaps I can post some stuff here for some nostalgic fun...
But as for the history, this is basically how it all went.
In the late 90's, on the Castlevania Dungeon site, I submitted the Dark Abyss script with some fake screen shots, as a fan fic. I joined the site for a while to see what people thought, and got to know some cool people like Eric Roman, Jorge, Dark Moon, and Anapan. I am also friends with DarkShire in real life, I don't know if he still posts here or not. I had a couple of people ask I they could put Sasha in their games. One I remember was called Castlevania RPG which I actually have a REALLY early build of and some screenies at home. But that project eventually was dropped by it's creator.
Eventually I stopped going to the forums.
Then a couple years later in 2001 (ish) had gotten an email (much like today) where people were for some reason talking about Sasha. So I rejoined the forum (not called the Inverted Dungeon) and reacquainted myself with the community at that time. I had another offer on the table for including Sasha in a homebrew game. This was Castlevania Online. I joined the project as a spriter and portrait artist. I did a TON of portraits for the game actually including Sasha and Sonic Reaper's two characters. I finished all of Sasha's sprites and came up with a story to get him in the game (since it took place in a totally different time period than Dark Abyss did). But sadly as you all know, that project fell by the wayside as well.
And that's pretty much that.
Although for the heck of it, once I Googled Sasha Belmont and found a fan sprite of all face graphics and Sasha was actually one of them. I never found out who made that. Do you guys know what I'm talking about?
But just because I stopped posting here doesn't mean I stopped thinking about the character...
I have numerous ideas for stories, 4 at the moment, that star the character.
I have decided to take away any reference to Castlevania so that I can actually write these stories and not get sued by Konami. So, no Belmonts, no Dracula, no Dark Abyss. He'll still be the most recent son of a line of great heroes, but that's where the similarities to CV will end. I will most likely change the last name, but I have never decided on one. In my head he's still Sasha Belmont.
I truly hope that one day, I can somehow get some of these stories that are dancing around my noggin published and adapted into something. Books, Comics, Movies... I don't know yet, but something. I am unsure of the best route to take, but for now, I am writing a novel for young readers that is totally separate from Sasha. But Sasha is definitely lurking around in there. I think he's a cool character and I like the ideas I have for his adventures. And clearly some other people like him or I wouldn't be typing this.

Thanks for remembering him and hopefully someday he will amount to something more than just scuttlebutt on a forum.
PS----------
I have also written lyrics for a trilogy of songs based on Sasha for my band Torrential Reign. I'll post the first one here for the heck of it. This song has never been actually written, it's just lyrics for now.
'Rhapsody in Blood'
Chapter 1
Blood by Moonlight
(intro)
Son of heroes – the last in a line
Destined for greatness, or so they say
Wanting no part – of their design
I forsook my birthright and sailed away
(verse 1)
All live in fear of the things in the night
Fiendish monsters, ghouls and the like.
They've taken a child, so pure as the snow
Just how and for what no one knows
(verse 2)
So far from home, near a year spent at sea
But something’s amiss I’m not where I need to be
The sun has not rose since the last week of June
And something is wrong with the moon.
(chorus)
Blood by moonlight, torch and starlight
What is waiting for us, we don’t know!
Chaos reigning, hope is waning
We are abandoned, tell us where did the son go?
(interlude) (Oliva style “half spoken”)
My people cry in terror and my cottage smolders still,
I should have taken up the role I was born to fulfill.
The shame of my selfishness burns deep inside,
Now it’s the wicked ones who have no place to hide!
(verse 3)
My path has lead me to dark answers and worse
A lost human child was the key to this curse
They froze her in time in a crystalline tomb
A ruby prison as red as the moon
(verse 5)
It shatters like glass, releasing the light
The moon fades from blood red back into white
She falls to the ground, opens her eyes
And bless her, the girl never cries
(chorus x2)
(outro)
There will be blood by moonlight
Where did the son go?
There will be blood by moonlight