The episode begins with a flashback to the events of the first movie, where Mewtwo, a genetically engineered Pokémon, is seen in a laboratory. The scene shifts to the present, where Mewtwo has created a secluded island for himself and other cloned Pokémon, seeking peace away from humans. However, he is still haunted by his past and struggles with his identity and purpose.

Meanwhile, Ash, Misty, and Brock are traveling together when they receive a distress signal from a nearby Pokémon Center. They rush to the location, where they find Nurse Joy and Officer Jenny in a state of alarm. They inform the group that Team Rocket has been spotted in the area, and they are up to no good. Ash and his friends decide to investigate further, determined to stop Team Rocket.

As they search for Team Rocket, the scene shifts to Team Rocket's hideout, where Jessie, James, and Meowth are plotting to capture Mewtwo. They have learned about Mewtwo's existence and believe that capturing him will make them incredibly powerful. They prepare their equipment and set out to find Mewtwo's island.

Back on the island, Mewtwo is shown interacting with his clones, including the powerful clone of Pikachu. Mewtwo expresses his desire to protect his friends and maintain their freedom. However, he is also conflicted about the potential threat that humans pose to them. This internal struggle is evident as he reflects on his past experiences with humans, particularly Ash and his friends.

Team Rocket arrives at the island, using a high-tech device to locate Mewtwo. They manage to infiltrate the island and confront Mewtwo and his clones. A battle ensues, with Team Rocket deploying various Pokémon to capture Mewtwo. Mewtwo, using his psychic powers, defends himself and his friends, showcasing his immense strength. The fight is intense, with explosions and chaos as Team Rocket attempts to subdue Mewtwo.

During the confrontation, Ash and his friends arrive on the scene, having tracked Team Rocket to the island. They witness the battle and quickly realize that they need to help Mewtwo. Ash calls out to Mewtwo, reminding him of their previous encounters and the bond they share. This moment of recognition helps Mewtwo regain focus and determination.

As the battle continues, Mewtwo becomes increasingly agitated by Team Rocket's relentless attacks. He uses his psychic abilities to create barriers and deflect incoming attacks. However, Team Rocket manages to capture some of the clones, which angers Mewtwo further. In a moment of desperation, Mewtwo unleashes a powerful psychic wave, causing a massive explosion that sends Team Rocket flying.

In the aftermath of the explosion, Mewtwo is left feeling conflicted about his actions. He realizes that while he has the power to protect his friends, he also has the potential to cause great destruction. Ash approaches Mewtwo, expressing his understanding and empathy. He reassures Mewtwo that he is not alone and that he can choose to be a protector rather than a destroyer.

Team Rocket, having survived the explosion, regroups and attempts one final scheme to capture Mewtwo. They launch a massive attack, but Ash and his friends join forces with Mewtwo and the clones to fight back. A climactic battle ensues, with all parties involved showcasing their Pokémon's abilities. Mewtwo, fueled by the support of Ash and his friends, fights valiantly to protect his home and his companions.

In the end, Team Rocket is defeated, and Mewtwo successfully protects his island and the clones. However, Mewtwo realizes that he cannot remain isolated forever. He decides to leave the island and venture into the world, seeking a place where he can belong. Ash and his friends bid farewell to Mewtwo, promising to support him in his journey.

The episode concludes with Mewtwo flying away, determined to find his own path, while Ash, Misty, and Brock reflect on the importance of friendship and understanding. The emotional weight of Mewtwo's decision resonates as he embarks on a new chapter in his life, leaving behind the island and the past.

In the ending of "Mewtwo Returns," Ash and his friends confront Mewtwo, who is struggling with his identity and purpose. After a fierce battle, Mewtwo ultimately decides to protect the world rather than destroy it. He uses his powers to erase the memories of the battle from everyone involved, including Ash and his friends, and then departs to find a place where he can exist peacefully. The episode concludes with Ash and his friends unaware of the events that transpired, but with a sense of hope for the future.

As the climax of "Mewtwo Returns" unfolds, the scene is set in a remote, desolate area where Mewtwo has established his base. The atmosphere is tense, filled with the weight of unresolved conflict and the emotional turmoil of the characters involved. Ash, Misty, and Brock arrive, determined to confront Mewtwo, who has been misunderstood and feared due to his immense power.

The first scene of the ending begins with Ash standing resolutely, his determination evident in his eyes. He calls out to Mewtwo, expressing his belief that they can find a way to coexist peacefully. Mewtwo, however, is conflicted, grappling with his identity as a clone and the purpose of his existence. His internal struggle is palpable, and the audience can sense his pain and anger as he questions the nature of humanity and his own being.

As the confrontation escalates, Mewtwo unleashes his psychic powers, creating a whirlwind of energy that sends Ash and his friends flying. The battle is intense, showcasing the strength of Mewtwo's abilities as he defends himself against Ash's Pokémon. Pikachu, loyal and brave, stands by Ash's side, ready to fight for their friendship and the chance to reach Mewtwo.

In a pivotal moment, Ash reaches out to Mewtwo, not with anger but with compassion. He shares his own experiences of feeling lost and misunderstood, hoping to connect with Mewtwo on a deeper level. This moment of vulnerability resonates with Mewtwo, who begins to lower his defenses. The battle pauses, and the tension shifts as Mewtwo contemplates Ash's words.

The scene transitions to a moment of clarity for Mewtwo. He realizes that his purpose does not have to be one of destruction. Instead, he can choose to protect the world and those who inhabit it. This revelation is visually represented as a soft glow surrounds Mewtwo, symbolizing his acceptance of a new path. The emotional weight of this decision is heavy, as Mewtwo understands the implications of his choice.

In the final moments, Mewtwo uses his powers to erase the memories of the battle from Ash, Misty, Brock, and Team Rocket, who have also been caught up in the chaos. This act is both a sacrifice and a gift, allowing them to return to their lives without the burden of the conflict they experienced. The scene is poignant, filled with a sense of loss and hope as Mewtwo bids farewell to Ash and his friends, disappearing into the horizon.

As the episode concludes, Ash and his friends are left with a sense of normalcy, unaware of the profound encounter they just had. They continue their journey, filled with optimism for the future, while Mewtwo embarks on a solitary path, seeking peace and understanding in a world that has often rejected him.

In summary, Ash, Misty, and Brock return to their lives, their memories wiped clean, while Mewtwo finds a new purpose in protecting the world. The episode closes on a hopeful note, emphasizing themes of identity, acceptance, and the power of compassion.

In the episode "Mewtwo Returns," there is no post-credit scene. The episode concludes with the resolution of the main plot, focusing on Mewtwo's journey and the emotional connections formed throughout the story. After the climactic battle and the resolution of the conflict with Team Rocket, the episode wraps up without any additional scenes or teasers following the credits. The focus remains on the themes of identity, friendship, and the struggle for acceptance, leaving viewers with a sense of closure regarding Mewtwo's character arc.

Mewtwo returns driven by a desire to understand its own existence and the purpose of its creation. It grapples with feelings of isolation and seeks to find a place in the world, leading to its confrontation with humans and other Pokémon.

Ash, Misty, and Brock are initially shocked and concerned upon learning of Mewtwo's return. They feel a mix of empathy and fear, recalling their previous encounters with Mewtwo, and are determined to help it find peace.

Giovanni, the leader of Team Rocket, seeks to control Mewtwo for his own gain, attempting to exploit its powers. His manipulative nature and desire for dominance create a significant conflict, as Mewtwo must confront its past and Giovanni's intentions.

Mewtwo's relationship with the cloned Pokémon deepens as it realizes they share a common struggle for identity and acceptance. Mewtwo becomes protective of them, showcasing its growth from a vengeful being to a more compassionate figure.

The battle serves as a pivotal moment for Mewtwo, illustrating its internal conflict between its powers and the desire for peace. It highlights the themes of friendship and understanding, as the other Pokémon challenge Mewtwo's perception of strength and purpose.

"Mewtwo Returns" is generally considered family-friendly, but there are a few scenes and themes that might be potentially objectionable or upsetting for children or sensitive viewers:

1. Existential Themes: The episode explores deep themes of identity, purpose, and the nature of existence, particularly through Mewtwo's struggles with its own creation and purpose, which may be complex for younger viewers to fully grasp.

2. Conflict and Violence: There are scenes of conflict, including battles between Pokémon and human characters, which may be intense for some children. The stakes are high, and the emotional tension can be palpable.

3. Emotional Distress: Characters experience feelings of sadness, loneliness, and betrayal, particularly Mewtwo, which may resonate deeply and evoke empathy but could also be upsetting for sensitive viewers.

4. Mewtwo's Isolation: Mewtwo's feelings of isolation and its desire for acceptance can be poignant and may touch on themes of loneliness that some children might find distressing.

5. Threats to Safety: There are moments where characters face danger, and the sense of urgency and peril can create a tense atmosphere.

While these elements are handled within the context of a children's show, they may still provoke strong emotional reactions in some viewers.