Bowser Jr. Space

Bowser Jr. Spaces are a variant of minigame spaces in Mario Party 9. When landed on (for a human captain), Bowser Jr. will appear and challenge the captain, as well as a randomly chosen second player, to a Bowser Jr. minigame. The second player can be either a CPU player or a second human player. However, if a CPU captain lands on this space, Bowser Jr. will always force a human player to play his minigame with the CPU captain. Bowser Jr. randomly picks one minigame out of all of them and asks the captain if he or she is "sure" that's the minigame they want to play. If the captain (also a CPU captain) says "No", Jr. will simply pick another minigame. When this happens, the second minigame Bowser Jr. chose is what the players must play. If the team wins, they get five Mini Stars each; if Bowser Jr. wins, he will take five Mini Stars from both players.

If only two players are playing, however, this space will not be present. Likewise, there are no Bowser Jr. Spaces in the DK's Jungle Ruins board.

Bowser Jr. Spaces return in Mario Party 10. It now appears and functions similarly to the Bowser Space in previous Mario Party games. If the player lands on this space, Bowser Jr. will do something bad to the player, but the effects are lighter than on a Bowser Space. In Mario Party mode (except Chaos Castle), if the homestretch of the board is reached and Bowser has not been released by then, Bowser Jr. will toss down Bob-ombs and create more Bowser Jr. spaces. However, if Bowser is released before then, he will replace any Bowser Jr. Spaces already present with Bowser Spaces and Bowser Jr. will not appear during the "Homestretch!" event.

Bowser Jr. Spaces are also a variant of Event Spaces in the amiibo Party mode of Mario Party 10. They force the player to play a random Bowser Jr. Challenge. If Bowser Jr. wins, the player will lose coins; if Bowser Jr. loses, the player earns coins. If the player is Bowser, Bowser Jr. will give him coins without playing a minigame.

Events from Mario Party 10
Bowser Jr. Space Events

''Events in  red  only appear in Mario Party mode and events in  blue  only appear in Bowser Party mode.
 * Lose Special Dice Blocks
 * Only the captain loses their Special Dice Blocks.
 *  Battle for 10 Mini Stars 
 * Bowser Jr. will trigger a Battle Minigame with all players betting 10 Mini Stars.
 * Bowser Jr. will provide the rest of the Mini Stars if the total is less than 40.
 * If a tie occurs, a Dice Block decides.
 * The payout goes as follows:
 *  Give 5 Mini Stars to the player in last place 
 * The same scenario from Mario Party 9.
 *  Lose half of your Mini Stars 
 * The same scenario from Mario Party 9.
 *  Bowser Jr. Revolution 
 * Bowser Jr. collects everyone's hearts and divides them equally among the remaining players and takes any leftovers.
 *  Reduced to 1 heart 
 * Bowser Jr. reduces the Captain's hearts to one.
 *  Everyone's hearts reduced by half 
 * Bowser Jr. reduces everyone's hearts by half. If a player has an odd number of hearts, the lower portion will be taken.
 *  Back 5 spaces 
 * Bowser Jr. sends the vehicle back 5 spaces.

Names in other languages
Bowser Jr.-Feld