Prior to the start of 2017, there were 976 known Banana Coins in the game. In early January of that year, a speedrunner discovered a widely undocumented 5-Banana Coin hidden in Fungi Forest while looking at how the game formats its save data. While looking through the stage's flags in the BizHawk emulator, the speedrunner noticed that the flag for 5-Banana Coins was incomplete, and used script analysis tools to reveal a DK Dirt Pile hidden under tall grass located near the Tag Barrel by the exit to the Chunky Minecart. Walking over the pile would cause the player to slightly bob upwards from the grass in an easy-to-miss moment, and slamming it revealed the 5-Banana Coin, bringing the known total to 977 Banana Coins.