yo! lately i've been skimming and comparing the different mespak's and the game itself and have found out some of the things they contain:
mespak00 contains:
-digimonlist, digegg list, items(equipments/far equipments), digiattacks
mespak01 contains:
-some npc dialogue, locations, game dialogues(enter your name, are you a boy/girl, yes/no etc.)
-title screen menu(new game, continue etc.),
-game menu(farmname, friend code, name, buy item, digi convert, item, sell item, bit, experience etc.),
-item descriptions
mespak02 contains:
-descriptions of digimons (314)
edit: i think this is in order and this site has a translation of the digimons (if not all)
Digimon Wikia
-some digiegg names (53)
mespak03 contains:
-game script(story)
mespak04 contains:
-digimon attack descriptions(i think i saw some)
-digiplates
-digivolution requirements (required level to digivolve etc)
-dna digivolution requirements
-item descriptions
mespak05 contains:
-i think this is relevant to the game srcipt(story)
i just skimmed the paks and tried to translate some of them...
these are the things that i have found...