Buy it if four people are going to sit in one room with a Switch. The twenty-player number in the marketing is a different mode, and it needs a paid subscription
Short verdict: Super Mario Party Jamboree is the right purchase for a household that wants a long, loud board game for exactly four people on one Switch - and it is the wrong purchase for a group spread across different consoles, because it is Switch only with no crossplay at all. Nintendo's own listing gives the players field as “Single system (1-4)” and “Online (1-20)”, and the gap between those two numbers is the thing most buyers misread.
The four is the board game. That is the mode people mean when they say Mario Party: one console, four controllers, a board, dice, minigames between turns, and an evening that runs considerably longer than anybody planned. The twenty is a separate set of larger online modes. You will not get twenty friends onto a board together, and buying this expecting that is the predictable disappointment.
The second thing to know before you buy: online needs a subscription. Nintendo's listing is explicit - “Any Nintendo Switch Online membership (sold separately) and Nintendo Account required for online features”, with “Internet access required for online features”. Local play on one console needs neither. If your evening is four people in one room, you pay once for the game and nothing else ever. Our breakdown of what multiplayer actually costs works the same sum for every platform.
Who this is for
A household with a Switch and four people who are not all gamers. This is the strongest case and it is a very strong one. The board structure means skill matters far less than it does in a racing game or a fighting game, the dice do a lot of the work, and somebody who has never held a controller can win. That is a rarer property than it sounds and it is why Mario Party keeps appearing in our list for people who do not play games and the family picks.
A group that wants the evening to have a shape. A board has a start and an end, which a pile of minigames does not. That is the difference between Mario Party and a party-game compilation, and it is the reason a Jamboree night tends to be remembered as one event rather than as an hour of something.
Who should buy something else
Anybody whose group is not all on Switch. There is no crossplay. A friend on a PS5 cannot join, and no setting changes that - the list of games that are not cross platform carries every Nintendo first-party title for the same reason.
A group of five or more in one room. The local cap is four, full stop. For five, our five-player page exists precisely because most games round down; for a bigger room, Jackbox is the structural answer - one person owns it and everybody else joins from their own phone, which scales to ten players plus an audience.
Anyone who hates the length. A full board is long. There are shorter settings, but the default experience is a commitment, and a group that wants to play three different things in an evening will resent it. Short games to play with friends is the honest alternative list.
The Switch 2 edition question
There are two SKUs, and you should read the box before you buy. Nintendo's store page for Jamboree carries a Nintendo Switch 2 version option alongside the original, and links a news item headlined “See what's new in the Super Mario Party Jamboree - Nintendo Switch 2 Edition + Jamboree TV game!”. What the listing does not do is explain the difference between the two editions, so neither will we - we are not going to describe features we have not read on an official page. What matters for a buyer is simply that two different products exist under almost the same name. The listing we price on this site is the Nintendo Switch release; if you own a Switch 2, check the SKU name in the basket. Our Switch 2 page covers what the newer console adds generally, including GameShare.