Disclaimer: I don't own kid Vs Kat and Ben 10

Chapter 4:

Coop and Dennis have seen a lot for ten years olds and had done things considered the impossible. They have face Kat, and Kat entire planet, but seeing an alien bigger and stronger turn to a small kid about their age was a whole new level of alien wierdness.

"I know how this looks but, I can explain" said Ben. But Kat just charged towards him with his nail sharp luckily Ben saw him and jumped out of his way and began to run for his life.

Ben ran pass Coop and Dennis as Kat began to chase him. Coop and Dennis still confuse, but are not willing to let Kat hurt another kid ran after them.

"Coop, how are we going to stop Kat?" said Dennis as they were running.

"By giving him taste of his own medicine" said Coop with an idea. When they got to Kat and Ben, Kat had already tied Ben to a tree and was about to use his sharp killer nails on him.

"Keep Kat busy" said Coop as he ran off. Dennis knowing he shouldn't argue about how dangerous it will be and began to yell at Kat.

"Hey you ugly Kat" yelled Dennis to Kat "you stink like a stunk, in fact you stink more than a stunk."

Dennis insults cut Kat attention from Ben and he ran towards Dennis. Dennis stood there with his eyes closed and waited for the pain he was going to get by Kat, but he didn't feel anything so he open his eyes and saw Kat in a purple bubble. He looked beside him and saw Coop with a purple gun. Coop walked up to Ben and Dennis followed.

"If we untie you will explain who you are?" said Coop to Ben as he untied him.

"Sure" answered Ben. Coop and Dennis untied him. Ben looked behind him and yelled to them "look out" and push them out of the way.

Kat had broken out of the bubble and ran towards Ben, Dennis and Coop, but Ben pushed them out of the way and slammed his watch and his body was engulfed in green light and he began to grow hair all over his body, he grew large teeth and his eyes went into his body and when the transformation was done he looked like a big yellow alien dog with no eyes and large sharp teeth. Kat stopped at his tracks and began to run away, but Wildmutt jumped in front of him and hit him with his left hand and Kat slammed to a tree. Kat took that advantage to try and escaped and climbed up to the tree and jumped from one tree to another till he couldn't be seen by anyone.

When Kat left Dennis walked up to wildmutt despite Coop protest and touched his head to check if he was actually Ben and not an alien dog with no intelligence. Then the hourglass on his shoulder began to flash red and made a beeping sound and engulfed Ben. Dennis removed his hand when Ben turned back to himself.

"Thanks you guys" said Ben now back to his normal self "if you guys didn't untie me I would have been cat food"

"No problem" said Dennis and began to introduce themselves "you know my name is Dennis and.." he pointed to Coop who was now beside him "and that's is my best friend Coop burtonburger and you are?"

"The name is Ben Tennyson" answered Ben to Dennis question.

"I don't need to rush into things but.." said Coop "how did you did you turn into those two aliens"

"Only if you can explain to me who that cat was" said Ben as brought out his hand to Coop.

"Deal" accepted Coop as he accepted Ben hand offer.

(A\N: Sorry about that the story is short, but I just need to stopped there for a good cliffhanger. Please review about what you think about the chapter.)