J1 is the taller agent that works under BB. J1 and J2 are called such because they have the same name and would cause confusion otherwise under the Chief. When others are speaking to him and his partner J2 together they are often refereed to as JJ. Such as when the Chief has a request of the both of them

When a crafty toy company "Wiz" also known in this show as Dark Wiz Company, finds crystals with the faint DNA of monsters known as "Legendz" are found and made into a battle game.<br><br>
A young boy named Shu receives one these crystals known as "soul figures" from his father after a baseball game. Legendz rapidly became popular and more and more children played it. Wiz employeys start to track down Shu for his special soul figure, for his soul figure can revive real legendz not just the little kiddy digital images! How will Shu fight his way to victory and claim this soul figure as his own?<br><br>
(Source: TV.com) 

Jack Johnson