After the events when Frieza became a cat, he was trained by gohan because he was the person Catiza liked the most because of the cat brain

Gohan: training Catiza with Goku Goten and trunks are watching

Vegeta in the background:* *mumbling about Catiza which scares him

Catiza: He suddenly begins to powerup from his golden form to his black form

Gohan: Oh- Colour me.. suprised?

Vegeta: feels that ki AGAH! AAAAAA- *flys away with his pride broken

Goku Goten and trunks: shocked Pikachu face