dragon ball origins 2 help

im at a level where you have to beat the ninja

Spoiler

or the five ninja brothers

in the tower
andI can do the first part when he hides in the trees, but when he goes to the explosive rocks I can't find him and lose like 3 quarters of my life and then I can't beat him

Spoiler

or them

so can anyone help???? please?thanks

sure easy one rock is different form others is more rounder, if dont get what i say just look closely to them

also i dont know if it can but look witch way they are going! :P

thnx!!!!