Game Guy's Sweet Surprise

Game Guy's Sweet Surprise
Appears in	Mario Party 3
Type	Game Guy mini-game
Time limit	10 seconds to select a Chain Chomp
Music track	Game Guy Mini-Game
Music sample

Game Guy's Sweet Surprise is a Game Guy minigame in Mario Party 3. It features two Chain Chomps known as the Big Chomp and the Little Chomp.

Gameplay

The player simply has to predict which Chain Chomp will finish eating its cake first. If the player correctly predicts that the Big Chomp will finish first, the player's coins are doubled. However, if the player correctly predicts that the Little Chomp will finish first, their coins are multiplied by an even greater number: either 4, 8, 16, 32, or 64. Before selecting a Chain Chomp, the player can read a description of the Chain Chomps' moods. If the player makes the wrong prediction, they lose all of their coins.

Mechanics

At the beginning of the minigame, the Big Chomp is always assigned a multiplier of 2×, while the Little Chomp is equally likely to be assigned a multiplier of 4×, 8×, 16×, 32×, or 64×. The probability that the Little Chomp finishes its cake first depends entirely on the multiplier assigned to it; the moods of each Chain Chomp do not affect their likelihood of winning.^[1]

At a fixed interval, one of the two Chain Chomps takes a bite of the cake. Below are the probabilities of either Chain Chomp taking a bite of their cake during an interval, based on the multiplier assigned to the Little Chomp:

Multiplier	Chance takes a bite	Chance takes a bite
4×	50%	50%
8×	60%	40%
16×	70%	30%
32×	80%	20%
64×	90%	10%

During the same interval, the Chain Chomp that took a bite has a 40% chance to take a second bite. The first Chomp to take six or more bites wins.^[1]

This means that the overall probabilities that either Chain Chomp finishes its cake first are as follows, based on the multiplier assigned to the Little Chomp:^[2]

Multiplier	Chance wins	Chance wins
4×	50.000%	50.000%
8×	70.927%	29.073%
16×	87.201%	12.799%
32×	96.460%	3.540%
64×	99.654%	0.346%

Expected value

Let B be the number of coins bet. The following table shows the EV for each multiplier assigned to the Little Chomp, as well as whether the player bets on the Big Chomp or the Little Chomp.

Multiplier	Bet on	Bet on
4×	2B * 0.50000 = 1B	4B * 0.50000 = 2B
8×	2B * 0.70927 = 1.41854B	8B * 0.29073 = 2.32584B
16×	2B * 0.87201 = 1.74402B	16B * 0.12799 = 2.04784B
32×	2B * 0.96460 = 1.9292B	32B * 0.03540 = 1.1328B
64×	2B * 0.99654 = 1.99308B	64B * 0.00346 = 0.22144B

The player should always bet on the Little Chomp if it has a multiplier of 4×, as it has the same chance of winning as the Big Chomp, but double the expected value. However, by betting on the Big Chomp when the Little Chomp has a multiplier of 64×, the player is nearly guaranteed to double their coins.

Controls

or – Choose Chain Chomp
– Select Chain Chomp

In-game text

Game Guy

"The Big Chomp and the Little Chomp will have a cake-eating race. Predict which one will be the quicker cake eater. If you guess right, you'll get more coins. But, if you guess wrong, your coins will be mine."

The Big Chomp and the Little Chomp

"I'm so hungry I could faint..."
"I haven't eaten since this morning."
"Love that cake!"
"I'm starvin'!"
"Food! Food!!!"
"Feed 'em faster!"
"No...more cake..."
"My tummy hurts..."
"It's too sweet..."
"I like mushrooms more than cake."

Gallery

Icon of the Big Chomp
Icon of the Little Chomp

Names in other languages