Dragon Ball Z: Cooler’s Revenge

Cooler chose not to act himself when his henchmen prepared to destroy the space pod carrying the Saiyan infant. He conceded that this burden rested with his brother Frieza, allowing the pod to slip away toward Earth. This decision ultimately led to his downfall, as that infant grew up to be Goku, the very warrior who would defeat him.

Early in the film, Cooler watches Frieza destroy Planet Vegeta and makes a conscious choice to let the infant escape, a choice that haunts him at the film's end.

After Goku was severely injured during Cooler's ambush, Gohan traveled to obtain the magic Senzu beans that could heal him. Though Salza destroyed the first batch, Gohan had a spare Senzu bean hidden away, which he used to revive Goku just in time for the final battle.

The search for Senzu beans becomes a critical subplot that keeps hope alive for Goku's recovery.

Cooler reveals a fourth-stage transformation that surpasses Frieza's powers. This form is more powerful than anything Frieza demonstrated, which is why Cooler believed he could easily defeat Goku despite knowing Goku had already killed his brother.

Cooler explicitly states his fourth form exceeds his brother's power level.

After being pummeled by Cooler in his fourth form, Goku saw his loved ones in danger and Earth itself threatened by Cooler's massive ki sphere. The sight of his friends being harmed and the need to protect the planet spurred Goku to push beyond his limits and unlock the Super Saiyan form.

Goku's connection to his friends and his protective instincts have always been the key to unlocking Super Saiyan in previous battles.

Cooler ordered his men to completely obliterate the forest to locate Goku, who had gone into hiding to recover from his injuries. By turning the landscape into a weapon, Cooler aimed to force Goku out of hiding and eliminate any chance of escape.

This desperate tactic shows Cooler's determination and reflects the widening conflict.

After Cooler incapacitated Piccolo during their confrontation, Piccolo was left weakened but not killed. He later recovered enough to appear at the film's climax, where he saved everyone by defeating Salza in a final defensive action.

Piccolo's recovery sets up his heroic intervention in the film's final moments.

After Goku defeated Salza and turned his attention to Cooler, Salza reappeared with a last-ditch strike aimed at killing Goku's friends. However, Piccolo intervened and killed Salza in defense, ending the threat permanently.

Salza's survival and final attack add an unexpected twist before the film's conclusion.

Goku was badly wounded while protecting Gohan during Cooler's ambush. Unable to continue fighting, he was forced to go into hiding in a cave to recover. This withdrawal placed the burden of protecting the group on his friends while he healed.

Goku's retreat leaves the team vulnerable and creates tension as Cooler's forces close in.

While Krillin and Oolong sheltered the wounded Goku in a cave, Gohan ventured out to find the magic Senzu beans that could heal his father. He successfully obtained the beans but was ambushed by Cooler's forces on his return journey.

Gohan's dangerous mission to obtain the beans becomes a race against time.

Cooler learned of Frieza's death through his forces and decided to reclaim his family's honor by eliminating Goku. The timeline in the film shows he gathered his henchmen and headed to Earth only after news of Frieza's defeat reached him.

Cooler's motivation is directly tied to family honor and the shame of his brother's defeat.