In that case, how does one make sprite comics?
I was afraid you’d ask me that one. At some point in the future, I intend to make a sprite comic tutorial that should get any burgeoning comic author on the right track. In the meantime, the short answer is: in Photoshop, under General Preferences, change Image Interpolation from Bicubic to Nearest Neighbor. This will allow you to adjust the size of your sprites without that annoying blurring. The appearance of the Prefs window may differ if you’re not using a Mac, but I’m sure you’ll be able to figure it out.