Dragon Ball Super: Season 3, Episode 15

3 - 15: The Tumultuous Victory Feast! A Showdown At Last?! Monaka vs Son Goku

Bulma holds a celebration party at the Capsule Corporation following the tournament, with Beerus lying to her about relaying the invitation to Monaka as he and Whis know Goku would want to fight Monaka if he were to attend. But Monaka does attend due to Jaco making an order to the former's delivery company, forcing Beerus to come clean about Monaka while threatening the others to hide this from Goku. When Goku does arrive, Goten and Trunks suggest that Beerus disguise himself in a Monaka costume to fight Goku. Beerus agrees to the plan, the fight eventually ended by Whis and Pu'ar disguised as Beerus. With Goku none the wiser, everyone carries on with the festivities.