There are several ways, but they require some playing of the game.  The easiest one is to talk to the mechanical Fat Chocobo aboard the airship Lunar Whale, but you don't get that until near the end of the game.  The only other way is to play the game until you reach the town of Kaipo.  You should only have to play maybe half an hour to get this far.  Once here, there is a house located in the very northeast of town.  Inside, there will be a person that resembles a rabbit dressed in red.  Talk to him and he will let you view the bestiary, but at this point there will only be about 7 entries, none of which are glitchy ones. Once you leave the room after talking to him, he will disappear.  Once he's disappeared, you must progress two more towns, this time some considerable playing, and you will find him in the Inn of Fabul castle.  If you speak to him, he will tell you that he left the bestiary with his friend Fat Chocobo.  To talk to Fat Chocobo, you must go into one of the small, circular forests that are full of birds, go to the nest at the northern section, examine it, and use the item "gysahl green" when prompted.  This will let you view the bestiary.  Of course, you don't have that much time, so I recommend using this Action Replay code.

94000130 FFFB0000
D5000000 00000017
C0000000 000000E3
D7000000 020D8510
D2000000 00000000

When this code it active, pause the game, go into the menu, and press up and select at the same time.  This should complete the bestiary 99%, so when you talk to the rabbit guy the first time in Kaipo you can tell wether or not it is working.  The glitching is primarily occuring on #71-82, 149-153, 165, 166, and 194.  I hope that this isn't too much, I realize that it's a lot to take in.

So how would I do that?  Sorry, not exactly the most accomplished computer whiz over here.  I found the .dsv file, so what should I do with it now?