Don Boneyard is the first antagonist of Fossil Fighters: Champions. His ultimate goal is to stop the Caliosteo Cup from finishing. He is the leader of the BareBones Brigade and was also the one who gave the members their Boneysaurs in the first place. The player first sees him on a stolen mammoth T.V. screen, where he threatens the tournament-goers with his gang if the cup continues to go on.
As the story continues, the Hero, along with Pauleen, Todd, Rupert, and others consistently ruin Don's plans. Why he wants to stop the cup is a mystery to the player at the beginning of the game.
Don Boneyard is first witnessed on the Mammoth Vision screen stolen during the cup. He is seen again on the T.V. later on, when announcing his plan to chip away at the Spinal Pillar. At certain points, he can be observed at the heart of his headquarters, issuing orders for Cole, Lester, and Lola to fill out.
He is never seen again until the player actually fights directly him at the BareBones Brigade Base. He uses a Rank 7 B-Rex and B-Brachio, as well as a Rank 8 B-Ptera. When defeated, he says that he remembers the player and says his or her name. Don then warns the hero of Joe Wildwest and to not trust him, but when Pauleen and Rupert arrive, he gets cut off and escapes. Don Boneyard is actually revealed to be Joe Wildwest, as Zongazonga stole his body sometime after the player's initial encounter with him in the beginning of the game. Later, he and the Hero find and ask Professor Scatterly if his research on Zongazonga had the method to defeating the sorcerer, and he leads them to Stone Pyramid, where they find the Caliosteo Pipsqueak, a weapon similar to a hammer that will knock Zongazonga out of bodies, as well as losing the ability to possess people for a time.
And he is voiced by Brian Drummond in the English dub and his Japanese voice is unknown.