Seeing this being implemented as SF battle spriteset, I looked at the others Suikoden sprites and as I can see, many of them could serve as enemies or even bosses, if you want (especially the large ones like Colossus etc).
BTW, by what percent did you enlarge the sprites and what interpolation method did you use for it? They are small enough, IIRC.
Yes, I totally recommend Suikoden and Suikoden 2 as sprites sources (available in The Spriters Resource).
For this one in particular, I didn't use resizing, it was kinda medium sized, and adding the sword made it big enough.
If you're going to port Suikoden assets, you might want to ask me before doing it, since I've already ported a handful of them, and I could give them to you.
Edit: i checked, I have Birdman (Eagleman), Banshee, and Ghost Armor. Im higly interested in that armadillo (since guntz is the only armadillo, but there should be more in the sf universe) but ii dont have space anymore in my mod, and it should be resized.