Sunswipe was made from Shadow's corpse, and a new spark made from Jazzimus Prime. That body isn't Shadow's corpse anymore since it was Reformatted by the Matrix of Leadership. Jazzimus told him about both Cybertronian cultures and Earth cultures. Jazzimus asked him if he wanted a specific weapon, Sunswipe said he did, and then Jazzimus went to Cannontrot, telling him of the Rookie, then Sunswipe came to Cannontrot, told him he wanted a Shoulder Cannon and a Bytanium Rifle. Cannontrot gave him those, but he added a blaster and a Sword.