You could just turn off autosave and use lama fights to earn money. You win, click save, bet more. You lose, click exit and reload last save and try again.
Seems more simple than that whole training thing.
Escape from White November Badge (easy – 5 points)
Fight your way off the starting ship in Sonny
You acquired this badge on May. 10, 2008. Sensei Slayer Badge (medium – 15 points)
Defeat the ghostly samurai boss in Sonny
You acquired this badge on May. 10, 2008. Alive Monsters Badge (hard – 30 points)
Complete the story events in Sonny
You acquired this badge on May. 17, 2008. Illuminator Badge (hard – 30 points)
Defeat the shadow boss in the fourth zone in Sonny
You acquired this badge on May. 19, 2008.