The thing is, you have to learn how the font rendering works (the font itself, and how/where the font data is stored) before you even can talk about dealing with it.

It is not like there is specific code to just "plug in" like changing fonts in your favorite text editor.

Well I am a native English speaker but I have trouble with grammar. Anyway I searched yahoo and found a library compression document that might help here. Hacking the GBA is a hard task even for those who aren't complete newbies. I wouldn't try it myself. I mostly stick with the NES.

Yes, you'll need to learn how to actually program in SNES ASM in order to hack SRW4.

Anyway, I'm fairly certain that what you're looking for is not a method to fit more text into the ROM but a method to fit more text onto the screen: i.e., not "compression", but a proportional font (or "variable-width font", "VWF", in the romhacking vernacular). You can edit the font in your favorite tile editor till the Guests go home, but to make the letters actually print like this instead of like this, you'll need to get into the guts of the game and do some redecorating.

And FYI, coding a VWF is not something we can just "tell you how to do". You'll have to learn SNES ASM, and get pretty damn good at it. Console graphics are not handled in a way conducive to proportional fonts "out-of-the-box", as it were: it's like teaching a man armed with a Paleolithic-era stone chisel to sculpt like Michaelangelo. You could fudge things by reprogramming the game to print an 8x16 monospace (or "fixed-width") font instead of the existing 16x16, a much easier task than going full-proportional, and it might be wise to get in some practice on another title before you try hacking the games you really want to do.

The screenshots you're showing demonstrate a variable width font. Notice how the width of "i" and "m" are different. 8x16 is still a fixed width, and doesn't sound quite like what you're looking for. Fixed width is a font like Courier, and variable something like Times New Roman.

As Shadowsithe said, that's a vwf, it has nothing to do with any DTE. I wonder how one can even draw a connection? The article you quoted talked about storage, not display. DTE is a compression for the text data. A vwf is a special form of drawing characters onto the screen. It's a good deal more difficult as implementing DTE as well. Most people will tell you that you can pretty much forget it as a beginner. The time it'll take you to learn this, AGTP will have released their translation 

People often just whip up their own fonts as they see fit. Fiddle around in MS Paint a bit. I know a lot of people are Chicago fans though.

 :huh:

"Just copy dat floppy!"

It's from a video.

...

I don't think anyone will arrest you for using that font.