Charge is a special ability which premiered in SD10. Rather than being restricted to a particular color, like most other special abillities, it is restricted to light spirits. Rush is its dark counterpart.
The effect of charge is different for each color.
Red: Increase the BP limit of your destruction effects by 1000.
Purple: Increase that the cores move from spirits by 1
Green: Increase the number of opposing cards exhausted due to your effects by 1
White: Increase the number of spirits refreshed by your effects by 1
Yellow: Decrease your BP- effects by -1000.
Blue: Increase the cards moved from your opponent's deck to their trash due to your effects by 1.