How pointless is that? The grade shop gives you 10x XP and 2x Gald. Paying for cheats that can be unlocked is lame. One could also download a save file (saving money and time).
Another issue I have is that max level on recent Tales games is 250 (10 levels are easy to get in the beginning and redundant later). Also 300 k gald is no fortune. On Tales of the Abyss you could buy several 100k+ items very early in the game (of course you could only afford them on the 2nd playthrough).
Satan said:
"You are for ever angry, all you care about is intelligence, but I repeat again that I would give away all this superstellar life, all the ranks and honours, simply to be transformed into the soul of a merchant's wife weighing eighteen stone and set candles at God's shrine."
