Crossover. Some events in this will be retold from the series and there will be other events that are all mine. And of course, invented characters are mine. I know I don't own the rights to TMNT or Monsters, Inc.

It had been just after Easter in Randall's first spring after he had come to New York to live with the ninja turtle family after he had been banishedfrom his own dimension, the Monster World.

Due to traumas and misunderstanding with his past, there would always be things that plagued Randall's mind that he would have to remind himself that he didn't need to deal with those anymore, or just live in the moment and deal with things as they came along.

Right now, he had a wonderful family who had taken him in and taught him many things and ideals. About honor and compassion. He had learned to care about others more so. And there were others that he would never care for.

Randall was still living in the basement at April's house. He did like his privacy and space when he wasn't working, or spending time with his friends.

Master Splinter, the wise rat, had taken it upon himself to teach Randall about how he had raised his sons, and he treated Randall as if he was one of them too, other than as a friend. All his life, Randall had wanted a strong male role model in his life, one that respected him, and he had thought he had had that in his old ex-boss, Mr. Waternoose, but it wasn't so. Master Splinter was filling this void real good. The one he should have had a long time ago.

Randall thrived on the friendship, kindness, respect, and sometimes playful competition from the turtles and human friends. He thrived on challenges.

Leonardo still trained him in how to fight, though there were just some forms of fighting he would never fully master because of his unique body shape. He also taught him about honor and compassion, how to care for others, to be more selfless. He had also started teaching him about Japanese writing.

Leo also didn't blow up at Randall if he was mad about something. That was something he usually did with Raphael though. Randall knew how to stay out of the way when Leo and Raph started going at it.

Randall and Raphael had an understanding with one another. They both could be hotheads at times. And they had friendly competitions with one another in training and playing games, even on the times when they patrolled together.

If there was one turtle who loved to play games, it was Michelangelo. Mikey loved video games the most, but there was also tag and hide and seek, and then there was one game Randall loved: ping pong.

Back in his other dimension, Randall had learned to be a pro at ping pong, but his version usually involved players with four arms. Here in this world, he had to downgrade it to two armed ping pong.

And all thanks to Donatello and Leatherhead, Randall could see things perfectly. No longer did he have to wear glasses. Here, he hadn't had to pay any money to get the surgery done, unlike in his own world.

Randall enjoyed hanging out with Don, Leatherhead, and April a lot because of their smart ways of thinking. They worked on mechanics together and solved the family's biggest issues when it came to the big time way of thinking.

When he hung out with April, he still only thought of her as a friend. He knew she was taken by Casey Jones. He still worked in her shop. He was always careful in not letting other humans see him. His invisibility did him a lot of favors in letting him hide from humans and possible enemies, and he would gladly help scare off other humans who meant to do her harm. She had helped to save his life a few times as well.

When it came to patrols, Randall didn't go on them as frequently as the turtles did, which was just about every night of the week. He went a couple of times a week. Or when he felt he needed some air.

Randall loved the independence that he had. All his life, he had been such a workaholic. Now his new life allowed him to do what he wanted to do, when he wanted to do them mostly. But he would never be able to just be accepted and be free to walk openly on the streets like a human.
…

At the end of April, one night when the turtles were on a patrol, they were all ambushed by the Foot clan again. They were all outnumbered. So much so that all four brothers were injured in quite a bad way.

Don suffered some cuts on his arms and legs, Mikey had a broken arm and cut on his head, Raph had a sprained ankle and broken wrist, and Leo had gotten cut on one his sides, a long cut on his right leg, and a cut on the cheek.

Using the remote that Don had managed to carry with him that night, he called the Battle Shell with it, and all four of them just barely managed to escape the Foot before they were dealt crushing blows.

When they pulled into the warehouse, they were all more than glad to be home, but now, they all had the dilemma of needing help to get these injuries taken care of. They took the elevator to the bottom of their lair. When they stepped out, Leo had Raph's arm wrapped around his shoulders because of his ankle.

Using the basic first aid kit in the truck, the ones who hadn't drove home had their wounds wrapped in minor bandages that the blood was now soaking through.

"Father! We need your help!" Leo called out to Splinter when the elevator door opened.

Splinter came out of his room. "What is it, Leonardo?" Then he saw the shape of his sons. "What has happened to you?" He asked, concerned.

"The Foot ambushed us." Don exclaimed.

They all headed for the infirmary. Don called April up.

"Hello." April said.

"April, it's Don. We were on a patrol tonight and got attacked by the Foot. Can you come down and help us? We were all hurt pretty good."

"Yes. I'll be right there, Don." April said and hung up.

She went to get the first aid kit of hers, plus additional medical supplies in her basement, and that was when she also knocked on Randall's door. He was watching a movie.

Randall gave a little growl as the movie was just getting good. He heard the knock. What now? He got up and answered his door. "What is it?" He saw that it was April.

"The guys ran into trouble tonight, Randall. I'm going to need your help." She stated.

"Alright. I'm not much of a doctor though." Randall said and he quickly turned off his TV before going with her to the lair.

When they got to the lair, they went to the infirmary, where Don and Splinter were trying to tend to wounds as best they could at the moment.

Randall saw that his friends were badly injured.

Leo needed the most stitches, both in his side and his leg. April began taking his bandages off and stitching his wounds the best she could. Leo tolerated it quite well. He just didn't like medications.

Splinter was treating Raph for his broken wrist and sprained ankle.

Randall helped set Mikey's broken arm. Don sewed up his own wounds and Mike and Raph's. April helped Don as well to make sure the stitches were accurate.

All four turtles spent the rest of the night in the infirmary.

"Guys." Leo spoke up.

"Yeah, Leo." Raph said.

"I think that after what happened tonight is more than enough to take from the Foot clan. I think it's time we started on how to get rid of them, or at the least, getting rid of the Shredder." Leo explained.

"Was the Shredder even there?" April asked.

"No. Just his cronies." Don said. "I can agree to that, Leo."

"I would love to take that bastard down!" Raph said angrily.

"Language, Raphael." Splinter warned. "But yes, I get what you mean, my sons. He must be dealt with, but not until you are all well again."

"I know I'd love to take him down too, after what he did to me." Randall agreed too, making a fist.

"Taking on the Shredder won't be easy though." Leo said. "We'd have to face his army and his Elite Guards. Maybe even the Foot Mystics too, if we take the battle to him at his home again."

"That would be the best place to take it to him, Leonardo." Splinter said.

They would begin battle planning for when the time was right. It would be at least several weeks while some wounds and broken bones mended.

For the next few days, April and Randall stayed down in the lair to help with anything the turtles needed. Casey even came down when he heard what had happened.

Once things were dealt with just fine that Don and Splinter could take care of, as Don had the least severe injuries, April and Casey went back to April's apartment. Randall chose to stay longer.

Randall gave Mikey a break by handling the cooking duties for them. He also got the medical supplies out from the cabinets and bathroom too as needed.

It was hardest on Leo and Raph to have to stop training, but it was necessary so they didn't rip any stitches, or harm any broken bones still healing.

Mikey was the one that milked the injury the most. He wanted everyone to just pay attention to him. It even got on Randall's nerves too. Randall didn't blame Raph for wanting to hit him. But Mikey also had that wound on his head.

When Randall got too annoyed with Mikey's whining, he would go back to April's. Though Mike's bros didn't have much of a choice but to stay and deal with it.