When you fight Naraku,Utsugi and Kagura, always use BlueSkyCalamity first. (Even if someone comes by to help you break it for you.)
Do not flee from battle unless absolutely necessary. If you are fleeing from battle more than you are actually fighting, your game may eventually freeze, or it will flash the leading character and tag along character repeatedly on a black screen, frozen in the last position they were in before they were attacked. You may also loose all visuals. You will still hear you characters movements and/or actions, but will not see anything but a black screen. If you intend to flee often, make sure to save your progress frequently. The only way to exit this is to restart the PlayStation2.
When you finish the game, restart it and when you get to Kiedes Village, go find the cat. Yhe cat is near the big tree in the north part of the village. Talk to the cat and your team will raise their levels.
Stuck at the mountain mansion level where Miroku runs off with that girl? Head over to the right side of the room and as far north as possible. Then, press X while facing the wall and you will say "there are some strange characters here". Inuyasha will join you by saying, "this is human blood". After some more discussion, you will finally be able to leave the room.
If you play as the male character then the others will refer to you as a "Her" or a "She".
When you start the game as a girl or boy,when you and Kagome and inuyasha goes to the bone eater's well and Inuyasha states that this is the place they throw dead demons, Kagome will refer to you as "Them" when she tells Inuyasha not to scare you.
When the four are talking to Kaede and Kagome speaks, she refers to herself as falling into the well instead of you which shows the wrong character said it.
When you first meet shippo, Kagome says something different then what it says in the subtitle box. Her voice will say "What is she supposed to think,with you looking like that?" when you subtitles reads "What is one supposed to think with you looking like that."
Run and repeatly tap walk to make it seem your characters are skating in the ground.
This is to unlock three of the many mystery field events. You plant these at that field in Kaede's village. By the way, you don't need to do this to beat the game.It's just like a side quest.
sky blue seed - mystery soil
silver seed - whale tail
crimson seed - blossom branch
Listen getting Sesshomaru's picture is a little work all you have to do is keep running into him and he will follow but you have to do this more than once run into him all of the Question marks find him and interact with him and soon you will get his picture and his love
To unlock the mystery field events for your bonus, you must raise your seeds well. You can then harvest their fruit. When the time arrives, you will gain a special fruit which unlocks the events.