Dunkey finds the hidden balloons in Luigi's Mansion.
credits:
https://www.twitch.tv/dunkstream
Balloon World, also known as Luigi's Balloon World, is an online minigame that appears as part of an update for Super Mario Odyssey, released on February 21, 2018. The minigame can be played by completing the main story and finding Luigi near the Odyssey in any of the kingdoms besides the Cloud Kingdom, Ruined Kingdom, Dark Side and Darker Side, and talking to him.
This minigame features two different modes: "Hide It" mode and "Find It" mode. In "Hide It" mode, the player has thirty seconds to hide a balloon somewhere in the kingdom. The player can choose to place the balloon before the time runs out or they can restart to try and find a different hiding spot. To help the player, there is an arrow pointing to the direction of where the balloon is located as well as a meter counter that will decrease or increase depending on how close or far the player is from the balloon. However, the arrow will disappear after a few seconds and the player can make it reappear by standing still. Collecting three Coins while either hiding or finding balloons will increase the timer by one second.