Episode 25

The Birth of a Superbeing!! (超生物の誕生!!) is the twenty-fifth episode of the JoJo's Bizarre Adventure anime. It is also the sixteenth episode of Battle Tendency. It covers Chapter 109 through most of Chapter 111 of the manga.

Kars has managed to become the Ultimate Thing, gifted with immortality and the ability to draw on nature's designs to modify his body. As the heroes feel despair over how they can defeat Kars now, Joseph has a plan.

Summary
Kars has outsmarted Stroheim and, combining the Stone Mask and the Red Stone of Aja, has finally managed to become the Ultimate Thing.

It is dawn and although Kars does not appear to have changed much, he takes everyone by surprise when he turns his hand into a squirrel. Said squirrel then decimates the Nazis and opens a hole in Stroheim's metal stomach before returning to its owner. The sun rises, killing the rest of the vampire minions, but Kars remains standing, immune thanks to the power of the stone. Kars's triumph is undeniable and the entire planet is seemingly doomed.

With the odds once again against him, Joseph has nonetheless a plan in mind: he grabs the stone and runs off with Smokey to lure Kars away from the others whilst thinking of a real plan. Eager to celebrate his apotheosis by killing the greatest thorn on his side thus far, Kars follows JoJo by growing wings and flying toward him. Leaving Smokey behind before he can tell him about Lisa Lisa, Joseph boards a plane to lure Kars away further.

On board, Joseph theorizes he may be able to beat Kars if he drops him into a volcano and heads towards a volcanic island of Italy. As Speedwagon attempts to stop Joseph by telling him about Lisa Lisa, the feathers that Kars had launched on JoJo's plane turn into piranhas, and octopus tentacles entangle themselves on the propellers, making the engines explode. As the plane starts to dive into the island, Joseph seemingly jumps down on a parachute. However, Kars approaches and sees too late that the parachute is a dummy; in reality, Joseph is still piloting the plane and is crashing it into Kars. The Ultimate Thing attempts to escape, but Stroheim appears inside the plane and stops him. The cyborg rescues Joseph once the plane explodes by sacrificing his own robotic legs when they hit the ground. The volcano begins to erupt, and Kars is flung into the lava and begins to melt.

Trivia

 * A common style for animes during their final episodes, the intro to this episode has sound effects added to its scenes. This includes scenes such as the Clackers hitting each other, the "JoJo's Bizarre Adventure" logo exploding, Caesar's Jump and Wamuu's Divine Sandstorm.