Straight out of Ryu Book IV this is a listing of enemies you will find in Infection. The way I've set it up is as follows: Monster Number/Name/Area Met, then their Level/HP/SP. Next is wether or not they can be Data Drained. And lastly are the items you can acquire from DD'ing them. You only get one of the three and in some cases there's only one thing you can get anyway.
The lower your infection rate, the more likely it is to obtain Virus Cores. Going after cores while in the "blue" leads to best results! To get through this game, you'll need 6 A's, 10 B's, and 2 C's. Grab an additional 4 B's for use in Mutation if you want. And on top of that collect 2 extra of each to be prepared for Quarantine! If you Data Drain regularly you'll more than likely get more than enough of each without needing to "grind" for 'em!
For enemies that know skills you can hover your mouse cursor over the skill name to see what it is that particular one does.
Monster List: 115 / 303
001: Razine - [Theta] Chronicling Solitary Gate
Level: 0 / HP: 50 / SP: 5
DD = No
002: Swordmanoid - [Delta] Voluptuous Her Remnant