Hi,
In the enemies sprite pack, there are 5 types of enemies, each type consists of 6 unique designs (which brings it to a total of 30).
Edit: My apologies. I have to edit my comment since I didn't realised I was replying to my pixel-sidescroller pack. Currently this is the only pack for sidescroller, the others are for top-down shooters. I'm still working on adding more ships / enemies to this pack.