In Super Mario Party Jamboree on the Nintendo Switch, up to four players can play together on one TV at the same time, not 20, but there are online modes, such as the "Coopathlon", in which up to 20 players can play together online, and the "Bowser Kaboom Squad", in which up to eight players can play cooperatively online.

This is the same game, only our suppliers are different.🫡

Yes, in Super Mario Party Jamboree there is a similar function to the Partner Mode from Super Mario Party. In this game, the "Partners" return, where a random character appears on the board and must be won through a mini-game to add them to your team. Each of these characters, also known as "Jamboree Buddies", has their own abilities and mini-games that must be played to win them and add them to your team.