According to your description, it should be Ultraman Ace Episode 13 (Death Penalty! The Five Ultra Brothers) and Episode 14 (Five Stars Scattered in the Galaxy).

The 13th episode is the beginning. The monster planned a scam to trick Ace’s four brothers (Zoffie, the first generation, Seven, and Jack) from the Ultra Star to the planet Gogda, and then Use Ultra's signature to trick Ace on Earth to the Gogda planet, as shown in the picture. During this period, Ace received the energy of his four brothers and returned to Earth. However, his brothers were in the hands of the monsters on the planet Gogda, and Ace did not dare to attack the monsters that were causing destruction on the earth.

In episode 14, a certain Earth military commander wanted to use a powerful super missile to destroy the planet Gogda. Later, Ace transformed under helpless circumstances, blew up the missile in space, and flew to the high altitude on his own. Gerda saved his brothers. After arriving at Gogeda, the monster created an Ace killer and beat Ace until he was unable to fight back. At the critical moment, the four brothers on the cross passed their final energy to Ace, and Ace got The energy used the light of the universe to kill the Ace killer, and finally ended the planet Gogda. He said goodbye to his brothers and returned to the earth to defeat the monsters on the earth.

/aisiaoteman/13/ (This is the link. After watching episode 13, you can click on the next episode to watch episode 14. These two episodes are one plot)