How to defeat gobi in ninja saga for iphone?

I really want to beat gobi in the gobi mission "The defeat of Gobi" please help!

What i did was save up 100 tokens, then used em to use the ultimate jutsu- which costs exactly 100 tokens per use. It's kinda worth it, though cuz you get a pet called the Kogobi which isn't as strong as the other gobi, but he's still cute and extremely cute. XD

That's a lie.

You need to be at a level that ends in 9 because the gobi is always ten levels ahead of you so if you are in level 60 he must be in level 70 i'm a level 19 and i have kogobi