The glitch happened in the cave in Kurinon Village, after the battle with the Rodanthe, there was a massive long text box to cycle through with a bunch of letters and numbers. I eventually got past it after hammering away at the A button.. only for it to happen again after the battle with Noriwuts, this text box was even bigger and took even longer to get through, even when I had the emulator on super speed.
The emulator I was using is TGB Dual, I downloaded the patch from here:
http://wikifang.meowcorp.us/wiki/Wikifang:Telefang_1_Translation_Patch
I've reached Ion Island now, and it seems that this is as far as the translation has gone, as all creatures and monsters now speak in numbers and symbols, like '//X066//', which I assume are the placeholder text boxes I've read about. It was fun but I don't think I can continue! This game is confusing enough without having no help from NPC dialogue

Forgot to mention: I applied the patch by clicking on the patch file, then selecting the Keitai Denjuu Telefang Power Version (Japan) rom. A box popped up after stating that the patch had been applied successfully. I had already started a save file before applying the patch, so I continued on from where I was (I had saved just before the battle with Rodanthe), straight away this is where I first encountered the glitch.
Hope this helps!