Get 29 parts and go to Final Trial. Make your way to the big arena and smash down the gate. Make sure you have at least 15 Yellows and the remaining Pikmin Reds. Go around and look for bomb-rocks in the pipes(in one there should be enough for all). Now, dismiss ALL your Pikmin. Take but one Yellow. Wake up Rover(that's what I call him) and dismiss the Pikmin purposely in front of him. Quickly call the Reds, and start throwing. After many rounds, he'll start getting a raged look in his eyes like he'd just drunk and proposed to his girlfriend and she said no. This is bad luck. He will jump up and squash any Pikmin under him. If he smashes a bomb holder, it won't explode. Finally, when he dies, collect the part. It will most likely be near sunset so carry it as far as possible but NOT back or else the game'll instantly end. Spend any and all remaining days except one to loaf around and make Pikmin(my goal then is to make sure there are 100 flower Pikmin of each kind.)