The Straw Hat Pirates, led by Monkey D. Luffy, arrive at Thriller Bark, a mysterious and eerie island shrouded in fog. As they explore the island, they encounter a giant shipwreck, which they soon discover is the home of the infamous Gecko Moria, one of the Seven Warlords of the Sea. The crew is immediately struck by the unsettling atmosphere, filled with shadows and strange noises. They soon realize that the island is inhabited by zombies and other supernatural creatures.

As they venture deeper into Thriller Bark, the crew is separated. Luffy, Zoro, and Nami find themselves in a graveyard where they are attacked by a group of zombies led by a skeleton named Brook. Brook, who is revealed to be a living skeleton due to the powers of the Yomi Yomi no Mi, explains that he is searching for his lost shadow. The crew learns that Gecko Moria has been stealing shadows from living beings to create his army of zombies.

Meanwhile, Sanji, Robin, and Franky encounter a group of zombies and are forced to fight them off. Sanji showcases his combat skills, while Robin uses her powers to create additional limbs to fend off the attackers. They manage to escape but are soon confronted by the powerful zombie known as Oars, a giant who is a reanimated corpse of a legendary giant warrior. Oars is under Moria's control and poses a significant threat to the Straw Hats.

As the crew regroups, they devise a plan to confront Gecko Moria and rescue their stolen shadows. They learn that the only way to defeat Moria is to destroy the shadows he has collected. Luffy, determined to save his crew, challenges Moria directly. The battle begins, and Luffy faces off against Moria, who uses his shadow manipulation abilities to create powerful attacks.

During the fight, Moria reveals his ability to control Oars, who becomes a formidable opponent for the Straw Hats. Zoro and Sanji join Luffy in the battle against Moria and Oars. The fight is intense, with Luffy using his Gear Second technique to enhance his speed and power. Zoro and Sanji work together to distract Oars, allowing Luffy to land critical blows on Moria.

As the battle rages on, the crew faces numerous challenges, including the arrival of Bartholomew Kuma, another Warlord of the Sea. Kuma's presence adds a new layer of danger, as he possesses the ability to repel attacks and teleport. The Straw Hats are forced to split their focus between Moria and Kuma, leading to a chaotic and desperate struggle.

In a pivotal moment, Luffy manages to land a decisive blow on Moria, causing him to lose control of Oars. The giant collapses, and the zombies begin to disintegrate without their shadows. Moria, realizing he is losing, attempts to escape but is confronted by the Straw Hats, who are determined to finish the fight.

As the battle concludes, the crew successfully retrieves their shadows, and Brook decides to join the Straw Hats, having found a new family after losing his previous crew. The emotional reunion strengthens their bond, and they set sail once again, leaving Thriller Bark behind.

In the aftermath, the crew reflects on their harrowing experience and the challenges they faced. They celebrate their victory, but the looming threat of Bartholomew Kuma remains, hinting at future conflicts. The season ends with the Straw Hats continuing their journey, united and ready for whatever challenges lie ahead.

In the ending of "One Piece: Thriller Bark," the Straw Hat Pirates face off against Gecko Moria and his crew. After a fierce battle, they manage to defeat Moria, reclaiming Brook's shadow and freeing the souls of the people he had captured. The crew then sails away from Thriller Bark, having gained a new ally in Brook, the musician, who joins them on their journey.

As the final confrontation unfolds on Thriller Bark, the atmosphere is thick with tension. The Straw Hat Pirates, weary yet determined, stand against Gecko Moria, the Warlord of the Sea, who looms large with his monstrous shadowy minions. The moonlight casts eerie shadows across the battlefield, illuminating the faces of the crew, each reflecting a mix of fear, resolve, and camaraderie.

Luffy, fueled by his unwavering spirit, charges at Moria, his fists clenched and ready to unleash the power of his Gum-Gum abilities. The battle is fierce, with Moria using his powers to manipulate shadows, creating a chaotic environment filled with monstrous zombies. Zoro and Sanji fight valiantly alongside Luffy, their movements synchronized as they take on the hordes of zombies, showcasing their growth as fighters and their unbreakable bond as crewmates.

As the fight escalates, Brook, the skeletal musician, reveals his true strength. He confronts Moria, seeking to reclaim his stolen shadow. The emotional weight of Brook's past is palpable as he fights not just for himself but for the souls of his fallen crewmates. The moment is poignant, highlighting themes of loss and the importance of friendship. Brook's resolve inspires the Straw Hats, and together they rally against Moria.

In a climactic moment, Luffy, Zoro, and Sanji combine their strengths in a powerful attack, overwhelming Moria. The Warlord, realizing he is outmatched, attempts to escape, but the Straw Hats are relentless. With a final, decisive blow, Luffy defeats Moria, shattering his control over the shadows and freeing the souls he had captured.

As the dust settles, the crew gathers around Brook, who finally regains his shadow. The joy and relief on his face are evident, a stark contrast to the sorrow he had carried for so long. The crew embraces him, welcoming him into their family. Brook, with a newfound sense of belonging, vows to join the Straw Hats on their adventures, bringing his music and spirit to their journey.

With the battle won, the crew prepares to leave Thriller Bark. They reflect on their harrowing experience, the bonds they have strengthened, and the new ally they have gained. The ship sails away from the haunted island, the sun rising on the horizon, symbolizing new beginnings and the promise of adventure ahead.

As they navigate the seas, each member of the crew is filled with a renewed sense of purpose. Luffy, ever the optimistic captain, looks forward to the next adventure, while Zoro and Sanji share a moment of camaraderie, their rivalry momentarily set aside. Nami and Robin exchange smiles, grateful for their victory and the safety of their crew. Usopp, filled with excitement, begins to dream up new tales to tell, while Franky, with his mechanical prowess, starts planning upgrades for the ship.

In the end, the Straw Hat Pirates sail into the unknown, united and stronger than ever, ready to face whatever challenges lie ahead, embodying the spirit of adventure and the bonds of friendship that define their journey.

In the "One Piece" season titled "Thriller Bark," there is indeed a post-credit scene that adds a humorous touch to the conclusion of the arc. After the intense events surrounding the Straw Hat Pirates' battle against Gecko Moria and the shadows of Thriller Bark, the scene shifts to a light-hearted moment.

The post-credit scene features Brook, the Straw Hat Pirates' new musician, who is still adjusting to his new crewmates. He is seen enthusiastically singing a song about his adventures and the crew, showcasing his quirky personality and love for music. As he performs, the other crew members are depicted in various states of amusement and annoyance, highlighting their unique dynamics. Luffy, in particular, is shown to be enjoying the performance, dancing along with Brook, while Zoro appears unimpressed, trying to sleep through the noise.

This scene encapsulates the camaraderie and light-hearted spirit of the Straw Hat crew, contrasting with the darker themes of the Thriller Bark arc. It serves as a reminder of the bonds they share and the adventures that lie ahead, leaving viewers with a sense of joy and anticipation for the next chapter in their journey.

Brook, the living skeleton, plays a crucial role in Thriller Bark as he reveals his tragic past and the loss of his crew, the Rumbar Pirates. His backstory is filled with emotional weight, showcasing themes of friendship and loss. Brook's ability to use music to connect with others is highlighted, especially when he performs 'Bink's Sake,' a song that resonates deeply with the Straw Hat crew and serves as a reminder of the bonds formed through shared experiences.

The Straw Hat crew faces Gecko Moria, the Warlord of the Sea, in a battle that tests their strength and resolve. Each member confronts Moria's zombies, which are reanimated corpses of powerful figures. Luffy, driven by his determination to protect his friends, battles Moria directly, while Zoro faces off against the formidable Bartholomew Kuma. The emotional stakes rise as the crew fights not only for their lives but also to save Brook's soul from being trapped forever.

Shadows are central to the plot of Thriller Bark, as Gecko Moria has the ability to steal shadows from living beings, using them to empower his zombie army. This theft of shadows symbolizes the loss of identity and life, as those without shadows become mere shells of their former selves. The Straw Hats must reclaim their shadows to regain their strength, leading to a climactic battle where they confront the consequences of Moria's dark powers.

The battle against Oars, the giant zombie, is a pivotal moment for the Straw Hat crew, showcasing their teamwork and individual strengths. Oars, a massive creature with immense power, poses a significant threat, but the crew's determination to protect each other shines through. This fight emphasizes their growth as a team, as they combine their abilities to take down a seemingly insurmountable foe, reinforcing their bonds and commitment to one another.

Nami's character development in Thriller Bark is marked by her emotional struggle and growth. Initially, she is fearful and hesitant, especially when confronted with the horrors of the zombies. However, as the arc progresses, she finds her courage and determination, particularly when she fights to protect her friends and confronts her fears. Her bond with Brook deepens as she empathizes with his loss, showcasing her compassionate nature and solidifying her role as a vital member of the crew.

"One Piece: Thriller Bark" contains several elements that may be considered objectionable or upsetting for children or sensitive viewers. Here are some aspects to be aware of:

1. Supernatural Horror Elements: The setting of Thriller Bark is dark and eerie, featuring ghosts, zombies, and other supernatural creatures that may be frightening for younger viewers.

2. Violence: There are scenes of combat and battles that include physical confrontations, injuries, and the use of weapons. While the violence is often stylized and not overly graphic, it may still be intense for some.

3. Themes of Death and Loss: The storyline touches on themes of death, the afterlife, and the emotional impact of losing loved ones, which could be distressing for sensitive viewers.

4. Body Horror: Some characters exhibit grotesque transformations or have unsettling appearances, which may be off-putting to certain audiences.

5. Mature Humor: The series includes instances of humor that may not be suitable for all ages, including innuendos and jokes that could be misinterpreted by younger viewers.

6. Emotional Struggles: Characters face significant emotional challenges, including fear, despair, and loneliness, which may resonate deeply and evoke strong feelings.

These elements contribute to a darker tone in this particular arc of "One Piece," and parental discretion is advised for younger audiences.