Inuyasha: A Feudal Fairy Tale

Note: This game is also titled Inuyasha Sengoku Battle.

Character select:
Press Up, Right, Down, Left, Up, Right, Down, Left at the main menu. Note: This will not unlock Totosai.

Fight as Totosai:
Hold R2 and press Up(2), Down(2), Left(2), Right(2), Up, Left, Down, Right, Up, Left, Down, Right. at the main menu

Alternately, go to Kagome's back pack and beat the records of the mini-games you played before. Basically, compare times and try not to get a very high score when you first play it.
Information in this section was contributed by IZZY1872.

Fight as Inuyasha (with demon blood risen):
Press Up(2), L1(2), Down(2), R1(2), Up(2), L1(2), Down(2), R1(2) at the main menu. Note: This does not work in Feudal Fairy Tale.

Alternately, successfully complete the game with everyone besides Naraku. If this did not work, get the rest of the shards with him. When you get Totosai, complete the game with him. You will have enough shards to unlock him.
Information in this section was contributed by IZZY1872.

View classic Inuyasha pictures during Supers:
Press Up(2), Down(2), Left(2), Right(2) at the main menu.

Alternate costume:
Press Square on the highlighted fighter at the character selection screen. This can be done in any mode.
Information in this section was contributed by IZZY1872.

Secret message:
Press R1 immediately before the title screen to hear a Japanese message after the title. It varies depending on who says the title.

Fight as Sango:
Successfully complete the game as Miroku.
Information in this section was contributed by IZZY1872.

Fight as Miroku:
Successfully complete the game as Shippo.
Information in this section was contributed by IZZY1872.

Fight as Shippo:
Successfully complete the game as Inuyasha. If this does not work, complete the game as Kagome.
Information in this section was contributed by IZZY1872.

Fight as Koga:
Successfully complete the game as Kagome. If this does not work, complete the game as Inuyasha.
Information in this section was contributed by IZZY1872.

Fight as Kagura:
Successfully complete the game as Koga.
Information in this section was contributed by IZZY1872.

Fight as Kikyo:
Successfully complete the game as Shippo.
Information in this section was contributed by IZZY1872.

Fight as Sesshomaru:
Successfully complete the game as Kagura.
Information in this section was contributed by IZZY1872.

Fight as Naraku:
Successfully complete the game as Sesshomaru.
Information in this section was contributed by IZZY1872.

View credits:
Unlocking all the characters in any order in feudal fairy tale mode. Then, select the last character that was unlocked and successfully complete the game.
Information in this section was contributed by IZZY1872.

Hint: Rock smashing mini-game:
Use Inuyasha and press Away + Square on dialog button, or try any other character that you are good with.
Information in this section was contributed by IZZY1872.

Hint: Flame slashing mini-game:
Use Kikyo and press Forward + Square; Inuyasha and press Back +Square and get closer.
Information in this section was contributed by IZZY1872.

Use Naraku and press Forward + Square to win. Note: Use it when Jaken's fire is low.
Information in this section was contributed by Sketcher.

Hint: Poison insect mini-game:
Use Sango and keep pressing Forward + Square in the back so that you can have room.
Information in this section was contributed by IZZY1872.

Hint: Pictures:
When close to death or when energy bar is blinking in damage, do your Super Special Attack or tag your partner. You will receive an alternate picture than compared to under normal conditions. Note: This also works with the alternate costumes.
Information in this section was contributed by Rocco.