In sublevel 4 there are tons of emperor blublax right? Well when you get to this sublevel, get all your pikmin and put them all in one spot where they will be safe from the emperors. There should be an emperor next to the ship when you enter the level. If you can, lure him into the main room with all the BOMBROCKS. (They will be the most useful object on this sublevel) Okay you know the emperors use their tongues to slurp up pikmin, well they will do the same to the bombrocks. There are two ways you can use the bombrocks, 1) have the bulblax slurp them up ( this way is best, when the bombs explode, the bulblax takes reasonable damage, you don't have to lift a finger, and the bulblax is stunned be the blast in side him) 2) the other ting to do is harder yet does more damage I think, What you do is punch a bombrock with olimar (or the pres.) and lure the emperors over to the rock when it explodes, doing this causes more damage if I remember correctly, but doesn't stun the bulbus bulblax. This way is also more hazerdous to you because you could get hit by the blast if your not careful.