changing game fonts for android

[chrisDLCTS]

I did a few searches to see if anyone had posted a guide on how to replace the default font on the emulator with another one, and it didn't really answer much of my questions. specifically for android. once I have obtained the font i'd like to use, how would I go about replacing it? games like Lunar and a few others are unplayable because of how large the font is. hell, if I could even reduce the size of the font that would be nice too. I don't have access to a computer, and no longer own a PSP so I was hoping there's a way to do this straight from my device.