Enter cheats in the Python Console.
To open the console, press Shift + O and then enter the following commands:
strong = X [X can be anything between 0 and 100]
smart = X
cute = X
weird = X
red = X
blue = X
green = X
black = X
white = X
mp = X [X is your maximum MP]
hp = X [X is your maximum HP]
stress = X
merits = Y [Y can be anything between -50 and 50]
money = XXXXXX [as much as you like]
Then press enter again at an empty line to execute the codes.
To get the spells, take 1 class of each magic and they are available to you.