Hole-In-One Curling is a Dream Event that appears in Mario & Sonic at the Sochi 2014 Olympic Winter Games. The objective of the event is to reach the house in the fewest pushes, with the event taking place in the Green Hill Zone.
In this event, the player can choose to play two, three or four holes. The player uses two characters for this event, on to push the stone, and the other to ride on it, with the characters changing positions after each hole. On each throw, the player starts by using either the left stick or and on the GamePad to angle the stone, and can throw it by touching and holding it on the touch screen before sliding a line away from it to decide the power of the throw. The further the player slides, the further the stone will go. Once the stone starts moving, the player controls the movement of the stone by tilting the GamePad or Wii Remote left or right to move the stone left or right, or can make the stone speed up or slow down by tilting the controller forwards or backwards respectively. The further the player tilts in a direction, the further the stone will go. The aim of the event is to land the stone on the house at the end of the hole in the fewest throws. If the player hits the flag and bounces out of the house however, they will not complete the hole on that turn. If the stone falls off the course, the stone will be returned to the original throw location at the beginning of the next throw. The player that takes the fewest throws to reach the house after all of the holes wins.
The course features several obstacles, including simple ones such as trees and rocks that simply act as a barrier to the stones. Dash Panels give the stones a speed boost in the direction they point in by passing over them, but are constantly moving unless temporarily stopped by touching them on the Wii U GamePad. Dash Panels on ramps also allow players to jump over certain sections of the course. Springs bounce stones further than standard obstacles when hit. Deep snow and mud both simply slow stones down when passed through, with the latter slowing down stones significantly more than the former. Hole 3 includes ice blocks that can be destroyed upon impact and slow stones down when hit, and do not reappear when destroyed. Hole 4 features sets of totems that will occasionally fall down when the player approaches them, which sections of can be destroyed by the player by tapping them on the touch screen. Destroying each segment takes several taps, and once the totem hits the floor no more segments of it can be destroyed. Segments on the floor then act as a simple obstacles, though will disappear before the player's next throw.