Rise of the Teenage Mutant Ninja Turtles: The Movie

Here's a rephrased version of the section:

As the year 2044 dawns, the once-united planet Earth finds itself under the merciless grip of the alien warlord Krang. The resistance has been decimated, and all hope seems lost. In a desperate bid to turn the tide, Leonardo (Leonardo) and Michelangelo (Michelangelo) make the ultimate sacrifice by sending their student Casey Jones back in time to prevent the invasion from occurring in the first place. This bold move comes at the cost of their own lives, as they willingly give up their existence to ensure the survival of humanity.

Fast-forwarding several months after the defeat of the Shredder (Shredder), Casey successfully reaches the present day, only to discover that his mission is far from over. A theft unfolds before his very eyes, orchestrated by none other than Hypno-Potamus and Warren Stone, with the coveted key that holds the power to stop the Krang's invasion at stake. The Turtles, fueled by their unwavering determination, manage to thwart the thieves' plans, but the Foot Clan seizes the opportunity to claim the key for themselves.

Meanwhile, a parallel narrative unfolds as Casey Jones (Casey) stumbles upon April O'Neil, who, in a surprising turn of events, knocks him out and brings him back to the Turtles' lair. As he regains consciousness, Casey shares his tale with the wise and enigmatic Splinter, revealing the true nature of the Krang's invasion and their own connection to this mystical realm. The Turtles, now joined by April and Casey, set their sights on the Foot Clan, who have successfully opened a portal to the alien world.

As they engage in an epic battle against the Krang, the Turtles find themselves drained of their mystic powers, forcing them to retreat and regroup. Leonardo seizes the key and closes the portal, buying his brothers some much-needed time. In a bold move to protect his brother, Raphael forces Leonardo to make a daring escape while he remains behind, captured by the enemy.

As the dust settles, the remaining Turtles, along with Casey, launch a counterattack against the Krang and Raphael, who has been parasitically possessed by Krang One. Meanwhile, Splinter and April work tirelessly to dispose of the key, ensuring it doesn't fall into the wrong hands. However, their efforts are soon thwarted as the Krang use the key to open a portal on top of the iconic Metro Tower, the tallest building in the city.

The Turtles and Casey find themselves ambushed in the subway tunnels, forced to navigate treacherous terrain and avoid the possessed Foot Clan soldiers. As they regroup and reunite with their brothers, Casey confronts Leonardo about his growing arrogance, revealing a poignant truth about what lies ahead for his family's future. With their bond renewed, the Turtles join forces once more to rescue Raphael and seize control of the key.

In a climactic turn of events, the Krang use the key to bring forth the Technodrome, unleashing its wrath upon New York City as they prepare to launch a full-scale invasion. The stage is set for an all-out war between the Turtles and their alien foes, with the very fate of humanity hanging precariously in the balance.

As the Krang forces are expertly diverted by April (April), Splinter, and Casey, the Turtles seize the opportunity to infiltrate their ship. With stealth and agility, they navigate the vessel with ease. Leonardo sets his sights on freeing Raphael from captivity, while Donatello and Michelangelo attempt to commandeer the ship's controls. Although they are initially apprehended, Leonardo's swift thinking allows him to reach out to his brother Raphael, guiding him to break free and reclaim their mystical abilities. Meanwhile, Casey (Casey), Splinter, and April successfully vanquish Krang Two, leaving the formidable foe badly battered and immobile. The Turtles then engage Krang One in a fierce battle, but despite their valiant efforts, they are eventually outmaneuvered. In the heat of the battle, Michelangelo, Donatello, and Raphael are thrown off the ship, while Leonardo forces Krang One back to its prison dimension. With his final act, he orders Casey to seal the portal, which destroys the Technodrome and inadvertently traps himself with the enraged Krang One, who unleashes a torrent of fury upon him. Fortunately, Michelangelo's newly developed portal abilities allow his brothers to rescue Leonardo, permanently imprisoning Krang One within its dimension.

As the dust settles, the heroes gather atop the Brooklyn Bridge to savor their triumph over pizza and revel in the city's rebirth. It is here that Casey drops a bombshell, revealing that Cassandra Jones, once a Foot Clan recruit, is his mother. As they gaze out upon the revitalized metropolis, the group makes a solemn vow to protect it whenever duty calls. Following this moment of camaraderie, Raphael sets his sights on breaking Leonardo's record for pizza box stacking, a testament to their enduring bond and lighthearted spirit.