Yellow Coin

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Yellow Coin
Yellow Coin.gif
Hitbox cylinder with radius of 100 and height of 64, offset down 0 units
Damage none
Damage without hat none
Speed Dependent on RNG. Varies based on how it was spawned.
Tangibility radius Someone please add
Interaction type Someone please add
Related
Red Coins
Blue Coins
Found In
All courses, The Castle

A yellow coin is an object found in most levels. When Mario interacts with a yellow coin, the coin counter increases, Mario is healed, and the coin unloads. When the coin counter reaches 100 while in one of the 15 courses, a 100 Coin Star is spawned above Mario. The amount that the coin counter increases and the amount that Mario is healed is determined by the coin's value, which is 1, 2, or 5 for yellow, red, and blue coins, respectively. Some yellow coins are spawned by Coin Spawners.

Various glitches such as cloning and Time Stop can be used to spawn and collect more coins than there are intended to be in a level.

Coin Duplication

When Mario interacts with a coin, a flag is set which informs the coin to unload when it next updates. When the coin unloads, it marks itself as "collected" so that it does not spawn again when Mario leaves the area and returns. Using cloning or Time Stop, we can prevent the coin from updating, and thus collect it without the coin being marked as "collected". This allows us to spawn the coin again, even after collecting it, effectively duplicating the coin.

In this way it is possible to collect more than the normal number of coins in a level. In several levels, it is possible to increase the coin counter to 999. However, when using cloning by itself, each duplicated coin takes up an object slot in memory. There are only 240 object slots total, and attempting to spawn an additional object once all of them are full will cause the game to freeze.

Collecting more than 255 coins in a level will not increase your in-game high score, however. Due to how the game keeps track of the score, it actually saves mod 256 for the total collected coins.

Course name Maximum Coins without coin duplication Maximum Coins with duplication More info
Bob-omb Battlefield 146 999 Breaking-Disappearing Cork Box Glitch
Whomp’s Fortress 141 999 Breaking-Disappearing Cork Box Glitch
Jolly Roger Bay 104 104[1] No infinite coin glitches are available in this course
Cool, Cool Mountain 154 154[2] No infinite coin glitches are available in this course
Big Boo’s Haunt 151 151[3] No infinite coin glitches are available in this course
Hazy Maze Cave 139 139[4] No infinite coin glitches are available in this course
Lethal Lava Land 133 133[5] No infinite coin glitches are available in this course
Shifting Sand Land 136 999 Breaking-Disappearing Cork Box Glitch
Dire, Dire Docks 106 999 Going through the loading point unloads all coin clones
Snowman’s Land 126 999 Money-bag duplication
Wet-Dry World 152 999 Going through the loading point unloads all coin clones
Tall, Tall Mountain 137 999 Entering and exiting the slide unloads all coin clones
Tiny-Huge Island 191 999 Piranha Plant glitch, or entering a warp zone during Time Stop on J 1.0
Tick Tock Clock 128 279 No other infinite coin glitches are avalible, apart from cloning, so 279 coins is the maximum coins you can get before the game freezes
Rainbow Ride 146 290 No other infinite coin glitches are available in this course, apart from cloning, so 290 coins is the maximum coins you can get before the game freezes
Tower of the Wing Cap 63 63[6] No infinite coin glitches are available in this course
Vanish Cap Under the Moat 27 27[7] No infinite coin glitches are available in this course
Cavern of the Metal Cap 47 47[8] No infinite coin glitches are available in this course
The Princess's Secret Slide 80 80[9] No infinite coin glitches are available in this course
The Secret Aquarium 56 56[10] No infinite coin glitches are available in this course
Wing Mario over the Rainbow 56 56[11] No infinite coin glitches are available in this course
Bowser in the Dark World 80 999[12] Whenever Bowser blows fire, there's a chance that some of the flames will spawn a yellow coin. Since he does this attack infinitely, you have the chance to collect infinite coins
Bowser in the Fire Sea 80 250[13] No other infinite coin glitches are available in this course, apart from cloning, so 250 coins is the maximum coins you can get before the game freezes
Bowser in the Sky 76 999[14] Whenever Bowser blows fire, there's a chance that some of the flames will spawn a yellow coin. Since he does this attack infinitely, you have the chance to collect infinite coins

References