It's using a text format that I'm unfamiliar with, which could be its own format. Characters are either 80-EF or F#00-F#FF I believe. 0A is line break, 00 is read end. The first few text boxes appear at 801613E0-80161418 in RAM. This changes when the game loads. At least for this intro, standard ascii english letters (20-7F) don't appear to load. It loads a 1 in that initial text box, but that is F0D0 for 1, F0D1 for 2, etc. 80-8B seems to be punctuation.
The full text appears to be at 179560 in the ROM.