Forum:Volcanic scattershot

So my friend says that in his Yugi-Oh DS game, it won't let him use Volcanic Scattershot's "raigeki" effect if his opponent controls only one monster and so house rules it that i can't use the card's effect in such a way anymore when we play. Does anyone know if i would be able to use Volcanic Scattershot's second effect if my opponent controls only one monster? It doesn't say anything about it on the rulings. I know this is kind of stupid but can someone help me?