Whoops, that was a typo mistake. I used a clean, not-yet-been-opened-in-the-emulator rom of Pokemon FireRed version 1.0 and that's when I began having difficulties. I am using the version of G3HS released last month.
Here's what I did: I applied the MrDS Attack and Decapitalization patch to a clean Pokemon FireRed Version 1.0 (the introduction lacks the word "PRESENTS") and then opened up the newly-patched Pokemon FireRed in G3HS. Tried to change Bulbasaur to a pure grass-type, but when the drop-down list appeared, it was completely blank without words. Tried to see if Bulbasaur would still take with two random (blank, there's no text) types selected, but on emulator always appeared as a normal type following my changes.