Heatran

One day...
The gang decided to take a lunch break by the mountains. Ash was gathering the wood, Brock was setting up a fire place and his cooking pot, Dawn was chopping up vegetables and Tomo was setting plates. They weren't aware of trouble up stream though. 
At a volcano, a Pokemon ranger named Ben was observing a wild Heatran. This Heatran was special because it knew the move Eruption, which was a move Heatran doesn't normally learn. Ben's mission was to capture it with his Capture Styler so Heatran could be taken to a national park, a Pokemon reserve where no people could capture it.
But unfortunately for Ben, Team Rocket was also after Heatran. 
"So, that's the Heatran that knows Eruption?" Cassidy asked.
"I wonder how it managed to learn that move?" Butch questioned.
"Oh who cares?" Cassidy said. "What's important now is that we capture it before that annoying Pokemon ranger does. Butch do you have the Pokemon ready?"
"Of course." Butch said.
Cassidy and Butch had water, ground and fighting type Pokemon on them because those three types were Heatran's weaknesses. 
"Good, now let's go." Cassidy said.
Right now Ben was riding a wild Pidgeot he had just captured to go after Heatran, who had just started walking away. But then a Machamp, Swampert and Rhyperior stopped it in it's tracks; the Pokemon were Cassidy and Butch's Pokemon of course. Swampert used Water Gun, Machamp used Rock Smash and Rhyperior used Hammer Arm to attack Heatran.
"Oh no, Heatran is in trouble." Ben said. "I've got to stop these Pokemon."
But before Ben could do anything, Rhyperior used Stone Edge to attack Pidgeot. Pidgeot flew out of the way, but Ben fell off and headed towards the stream below him. He quickly summoned a Feraligatr from his capture styler for help, and they went off downstream. 
Coincidentally Ben and Feraligatr ended up where Ash, Dawn, Brock and Tomo were. The gang noticed Ben on top of Feraligatr and helped him to shore.
Ben then quickly woke up.
"Hello, my name is Ben." He introduced himself. 
Ben was one of those people who was full of spirit and could recover quickly. 
"Your Feraligatr brought you here." Brock said. 
Ben thanked Feraligatr and it disappeared.
Suddenly he noticed his capture styler was missing.
"You're a Pokemon ranger, aren't you Ben?" Tomo asked.
"That's right and I was on a mission to capture a Heatran."
"Heatran?" Dawn asked. 
She then looked it up on the Pokedex.
"Heatran, the Lava Dome Pokemon. It dwells in volcanic caves. It digs in with it's cross shaped feet to crawl on ceilings and walls."
"Wow, fancy a Heatran being over here." Ash said.
He remembered the Heatran they met before.
"This is a special Heatran as it knows the move Eruption." Ben explained. "Then a Swampert, Machamp and Rhyperior attacked it."
"It sounds like that Heatran may be in danger." Brock said. 
"Yes and that's why I must complete my mission and take Heatran to the National Park for safety." Ben said. "Since I lost my capture styler can I ask for your help."
"Of course." Ash replied. 
"I'd love to help a Pokemon ranger." Tomo said.
"I'd love to see this Heatran." Brock added.
"Always happy to help." Dawn continued.
"Great. Follow me, everyone." Ben said, appreciating the help.
Meanwhile...
Butch and Cassidy were searching for Heatran again. While Ben had been going downstream, Heatran had managed to push Swampert, Machamp and Rhyperior back with Flash Cannon, Eruption and Earth Power then he quickly ran away.
"That Heatran was more powerful than we thought." Butch said.
"All the more reason to capture it." Cassidy said. "Giovanni will become unstoppable with that Pokemon."
Just then Butch noticed something on the ground; it was Ben's capture styler.
"Looks like that Pokemon ranger lost his capture styler." He said. 
"Well this will make capturing Heatran easier for us." Cassidy said. "If that ranger doesn't have his capture thing, then he won't get in our way while we catch Heatran." 
"Yes, you're right." Butch agreed.
But they still needed to find Heatran.
Back with Ben and the gang...
They were still walking up the area where Ben last saw Heatran. He kept on feeling the ground to check the temperature. As Heatran was the magma Pokemon, it was the type of Pokemon that would go near lava. So Ben's plan was to search for the volcano's lava in case Heatran would be there. The group walked on and on, which seemed like ages, until Ben finally said they were getting warmer. There was a cave leading to the mountain. They went inside the cave quickly to see if Heatran was there. The guess turned out to be right as there was a lake of lava and Heatran was walking up the walls. 
"We've found Heatran." Dawn said. "But what are you going to do Ben?"
"If I hadn't lost my capture styler I would be able to catch Heatran." Ben said.
"I take it you can't catch Heatran in a Poke Ball, right?" Ash theorized.
"That's right." Ben nodded. "The rules are only to catch Heatran with the capture styler and it must be captured unharmed."
"Then what should we do?" Dawn asked.
Before anyone could think something Machamp, Swampert and Rhyperior appeared.
"They're the three Pokemon that attacked Heatran before." Ben said. "Where did they come from?"
Laughter interrupted Ben.
"Thank you for leading us to Heatran." Cassidy said.
She and Butch had secretly been following the group to look for Heatran.
"Not you two again!" Ash shouted.
"Nice to see you again, kid." Cassidy sarcastically said.
"You know these people?" Ben asked.
"They're members of a group known as Team Rocket." Brock said. "No doubt they intend to catch Heatran for evil intentions."
"But of course." Cassidy said. "This Heatran would make a excellent addition to Team Rocket, don't you think?"
"We disagree!" Dawn shouted.
Butch looked at Ben and revealed the capture styler he and Cassidy found earlier.
"Since you don't have your capture styler Pokemon ranger, we won't have a problem here." Butch smirked.
"My capture styler!" Ben gasped. "You give that back to me right now!"
"Not a chance kid." Butch smirked.
"Rhyperior, Swampert attack Heatran now!" Cassidy demanded.
Rhyperior fired Rock Blast and Swampert fired Water Gun. The two attacks hit Heatran.
"No!" Ben shouted.
Tomo sent out his Pidgeotto, Staravia, Charmeleon, Lileep and Anorith to battle.
"You leave Heatran alone, you bullies!" He shouted.
He ordered his Pokemon to attack Swampert, Machamp and Rhyperior. Ash explained to Ben that Tomo wishes to become a Pokemon ranger.
"Seeing Tomo trying to protect Heatran, I understand his desire." Ben said.
Cassidy and Butch were not happy with this and called out Drapion and Mismagius to help deal with the situation. 
"Urgh I need to get my capture styler back from Team Rocket." Ben said.
"I'll take care of it." Ash said.
He instantly converted into his dragon form.
"You have something that doesn't belong to you." Ash picked Butch up and carefully took the capture styler from him then tossed the Team Rocket member down to the ground.
"Thanks." Ben said.
Suddenly there was rumbling and shaking. Because of the fight, a rock avalanche was forming; it looked like a cave in. There was more trouble because the bit of the wall Heatran was on was crumbling and it fell. Ben quickly summoned Feraligatr again.
"Use Ice Beam on the lava." He ordered.
The hot lava turned into rocky ground and Heatran was saved when it landed on the ground. The avalanche then started to get worse. Cassidy and Butch returned their Pokemon, then quickly ran away; it was way too dangerous for them to attempt to get Heatran, so they retreated. 
"Let's get out of here." Ash told the others.
Ben quickly went over to Heatran and told it he was going to take it to a national park where it would be safe. Heatran understood that Ben and the gang tried to help it earlier, so he agreed with the plan. Ben captured Heatran with his styler and then everyone quickly left the cave with Heatran. Just in time too as the cave collapsed as soon as they got out. 
"Talk about a close call." Ash mumbled.
Everyone else agreed.
After escaping the cave with Heatran, Ben contacted headquarters to pick them up. Soon a helicopter arrived to take Ben and Heatran to the national park where Heatran will be safe. Ben thanked everyone for their help.
"If it hadn't been for you guys I probably never would have completed my mission." Ben said. "And Tomo I'll tell headquarters about how you helped deal with Team Rocket and how you wish to become a Pokemon ranger."
"Wow, thank you Ben." Tomo smiled.
Ben and Heatran then got into the helicopter and it took off. The gang waved until they could no longer see the helicopter.
With that excitement over, the gang wondered what exciting things would happen next.