Bonk Rocks, Pegasus Rocks
Bonk Rocks is a nickname for the cave hidden under the pile of rocks located directly west of the Graveyard, which contains an item. In spoiler sheets, this item location is referred to as Pegasus Rocks. The player must use the Pegasus Boots to dash into these rocks to reveal the cave, and since dashing into an object and bouncing off of it is commonly referred to as a “bonk”, this item location check came to be known as Bonk Rocks.
If a progression item is hidden in this location, it means that the Pegasus Boots were required for Go Mode.