Dragon Ball: The Great Demon Angel

After transmigrating to the Dragon Ball world, Karu became an angel of the Great Demon Realm and came to Earth for a visit. He spent a few leisurely days playing at a farmer's house.

Before he knew it, the farmer's ears had grown pointy, and he had been turned into a demon without realizing it.

One day, Raditz arrived in a spaceship and got thoroughly beaten up by the farmer.

Vegeta: “Raditz, you useless fool! You got beaten by a weakling!”

A year later, on Planet Namek.

“Huh? Goku, why is your Super Saiyan transformation black and gold?” Karu asked in surprise, watching Sun Wukong transform as his gaze fell on those pointy ears.