Junkyard Dog MK II is Sol Badguy's main weapon in Guilty Gear Vastedge XT. The sword has a rectangle-shaped blade, and a red and white color scheme. It also has a secondary function as a long-range weapon that can fire a high-level energy spell called Saint Oratorio. It is later upgraded to the Junkyard Dog MK III casing in Guilty Gear Xrd -SIGN-.
Junkyard Dog MK II is a combination of Fireseal and the Flashing Tooth, which further amplifies Sol's fire magic. He had it developed on the recommendation of Dr.Paradigm in order to create a "micro-delivery system" for the ultimate spell, the Saint Oratorio, which is a Magic Art specifically created to work in concert with the OutRage. He constructed it to transfigure into a long-range cannon that can fire magical bullets packed with his own flame magic as well as an extremely powerful energy spell called Saint Oratorio, which can release intense bursts of magical energy. However, the backlash from unleashing this spell is tremendous, causing it to not only cause significant damage to the target and environment, but the user as well, which is why Sol utilizes it sparingly.
- As a coincidence, in the older Guilty Gear games, the Fireseal's appearance resembles a gas lighter (much less so in Guilty Gear 2: Overture), while the Junkyard Dog looks like a Zippo lighter. When the casing of Junkyard Dog is unlocked, it resembles a dragon's maw (likely an intentional reference to Sol's Gear form).