Super Energizer

The Super Energizer is a mandatory ship part. It does not seem to replace any old ship part, most likely made by Olimar to improve the S.S. Dolphin's performance.

The Super Energizer is found inside a Goolix in Impact Forest on Day 7 or further. The Pikmin are supposed to break down a white wooden gate, and then build a bridge that connects to a tree stump. The Goolix will spawn there, and the Super Energizer will drop when the Goolix is defeated.