Jack had signed on to be apart of a super Mario bros course. It would have real enemies from the mario games as obstacles. He was hired to be changed into a chain chomp to go after Mario. The staff brought Jack over to a post in the ground. Jack stripped off his clothes and the staff injected the serum into his arm. On his back, A sliver hook appeared and a chain link quickly extended out from it. The staff quickly secured it to the post and ran away as Jack kept changing. His skin turned pitch black as his arms and legs shrank into his body. On his stomach, a large slit opened up revealing large sharp teeth. He could open and close it like his normal mouth which slowly faded away. He tried to speak from his new mouth only to hear barking. His head began shrinking into his torso at this point. Jack closed his eyes as the top of his head was absorbed, only to open them again on his torso. Finally, his torso started inflating, morphing into a round shape. He started off small and kept getting bigger, soon his size compared to the one in super Mario 64. The mental changes started kicking in. Images of Mario flooded his head, making him angry and making him bark wildly. He soon saw the portly plumber and prepared to attack.