|"That's not what happened at all!"
This topic is considered non-canon because it never appeared in the TV series.
The Golden Pick Axe is a Skulkin weapon used by Bonezai. As the name suggests, it is a large pickaxe, identical to the Grim Pick Axe apart from it being a golden variant. According to its official description, it is made of solid gold and is highly desired (whether for its monetary value or its power in battle).
No matter who or what you are digging, the Golden Pickaxe makes a deep impression. Made of solid gold, it's really made for fighting... It has to be, everyone wants it.