Coin Discoloration

Coin discoloration is a mechanic in B3313 added in v0.9. It consists of several new types of coins with various effects. This page lists every type of coin in the game, their effects, and how they spawn.

Base game coins
These coins spawn from the beginning of the game, and are present in normal SM64.

Yellow Coins
The basic SM64 coins, and the most common. They add 1 to the coin counter, heal 1 HP, and can be found by defeating enemies, in boxes, or scattered around stages.

Red Coins
Also found in SM64, Red coins are a type of collectable related to stars. Certain levels replace them with small "Star Tokens" that function the exact same. They are worth 2 coins and heal 2 HP.

Blue Coins
The third and final base game coin, they can be found after hitting blue coin switches or by defeating certain kinds of enemies such as Motos. They are worth 5 coins and heal 5 HP.

"Personalized" Coins
These coins will start spawning after a certain number of red stars, and will spawn in place of normal coins.

Purple Coins
Purple Coins remove 1 from the coin counter, and will also damage the player for 1 HP. They are never found throughout the level, and can only spawn in enemies, crates, or boxes, presumably to catch the player off-guard. The chance of purple coins spawning increases the more HP the player has, with almost every coin being a purple coin at max HP. They seem to have an unusually high chance of spawning in Pleasant, Pleasant Falls.

Green Coins
Green Coins add no coins to the coin counter and heal 3 HP, and will replace coins in coin rings and lines. These coins are the inverse of the purple coins, having a higher spawn chance on lower HP, and almost never spawning with max HP.

White Coins
White coins are worth 0 coins and do not heal the player, and have a 25(?)% percent chance to crash the game upon picking them up. They have an even rarer chance to randomly spawn almost any object.

Motos Factory contains a guaranteed white coin spawn in one room, which will lead to an unpleasant surprise if collected.

Trivia

 * Coin Discoloration is based on the mechanic of the same name found on the MIPS Hole Wiki (AKA SM64 Conspiracies Wiki). Many of the coin effects are taken directly from their page on coin discoloring.