Faster level up
     This  is  very  easy.  Whenever  you find Inuyasha along with the
others  wander  around and when you find a group of 4 or more like wid
hermits  or  something  just  use Inuyasha's wind scar. It gets rid of
them and gives you about 50 extra experience points!

Get your other characters to attack with you:
     If  you  use an attack with any character, you will sometimes see
the  faces of characters on the bottom half of the screen. Touch their
faces by using the stylus and they will fight with you.

Note 1: If you do this, you will lose one energy cell. 
Note 2: Maximum two characters attack with you.