Fragment of Hope

Fragment of Hope is the final area in, and the only area in the final sector, The Final Stretch. In order to access this area, the player must have gathered at least and have completed The Last Lair. Captain Olimar's purpose in this area is to find the missing ship piece, since without it, he cannot escape the planet. In his search, he finds a massive creature, the Berserk Leech Hydroe. This is the final boss of the game, and its defeat makes it drop the piece Olimar was after, and triggers the game's ending cutscenes.

Plot
Olimar's plan is to gather at least to power up the S.S. Dolphin II completely and lift off. If The Last Lair is completed before this goal is met, the ship will tell Olimar to return to previous areas and collect more treasure. If the milestone is reached before The Last Lair is completed, the ship will try to scan its own, status, realize that an important component is missing – the Sparklium Converter – and suggests that Olimar explore more. If it happens after the area's completion, the ship will scan around and realize that the important piece is held by a massive beast in the new sector, The Final Stretch.

Once he enters this area, after exploring a bit, he comes face to face with the Berserk Leech Hydroe. The changes forms two times before it is eventually defeated. When that happens, it withers away and dies, and from inside pops out the Leech Hydroe with the ship part lodged in its head. It tries to attack Olimar and the Pikmin, but ends up falling and losing the ship part. This makes it revert back to its normal, cowardly self. After it runs away from Olimar, the captain retrieves the missing piece and is beamed up by the S.S. Dolphin II's pod. The ending cutscenes then start.

Description
As soon as Olimar lands, Hydroe bramble will spring out from a wall and try to attack the fleeing S.S. Dolphin II pod. As Olimar makes his way deeper in the area, more bramble closes in on him, blocking his chances of retreating. After a small tunnel, Olimar finds himself in a large open arena. The arena itself, for the first and second forms of the boss, is not much larger than one screen width, but the arena for the final form is larger, taking up two screen widths.

Trivia

 * The name "Fragment of Hope" is named similar to areas in previous games, namely the Forest of Hope and the Garden of Hope. Although, these are both early areas in their respective games, while here it is the final one.