Outdoor Baths (Night)

"Um, Xiao-Long, no offense, but why did you join us out here if you can't get in?" Midoriya asked as he and most of the other males students entered the hot spring.

"Yeah, don't you like, fall apart in water?" Kaminari asked.

"Yes, but that doesn't mean I can't also relax out here with you." Dominic said, clad in nothing but a white towel. "Tell me, do any of you know how hot springs are created?"

"They're formed when underground magma rises closer to the surface of the Earth, heating up the water." Iida said. "When it does reach the surface, a hot spring is made."

"Exactly." Dominic said, putting a finger in his mouth before raising it into the air. Eventually, he found what he was looking for and started walking a few feet away from the main spring. "Since I can control magma, it's only natural that I can do THIS!" The boy punched the ground, creating a tremor felt for miles. His attack left a 3-foot deep crater, filled with cracks. A deep rumbling noise came from the crater, scaring a few of his classmates.

"Uh, what's happening?" Ojiro asked, worried.

Suddenly, magma erupted from the crater, filling it like a bowl. Once there was enough, Dominic sealed the cracks and marveled at his creation. "And now, to soak." The boy took a step into the magma before fully sinking in, only his head and shoulders visible. "This is the life."

"You're telling me that you're lava-proof!?" Kaminari screamed.

"I mean, you're blood-proof." Dominic blanched. Since his internal workings were mostly made of magma and volcanic rock, it only made sense that he could easily withstand this kind of heat. Hearing the sound of familiar footsteps, he looked over at the Camp Building. Charizard walked out before moving towards its trainer. "Did you come out here to soak too?" The Pokemon nodded, then stepped into the lava spring, leaving its tail flame out.

"Okay, are all of your Pokemon able to just swim in lava?" Kaminari asked, both amazed and scared.

"Only a select few." the trainer said. "Charizard learned how to when we were battling a strong Pokemon that lived deep underground." That battle was particularly difficult. Primal Groudon was no joke. He attributed most of their victory to the fact that many of Groudon's Moves were resisted by Mega Charizard Y. Speaking of which, the Flame Pokemon was currently yawning while it was in the spring.

"Charizard seems to really enjoy the spring you made, Xiao-Long." Iida said. He'd never seen the Pokemon look so content.

"Yeah, Charizard likes hot environments, and it doesn't get much hotter than this." Dominic said, looking at his partner before closing his eyes.

Meanwhile, Mineta was standing in front of the wall dividing the male and female sides of the springs. "Bathe, my angels." he said, pressing his face on the wall. "How stupid of them not to stagger the times we'd be naked next to each other."

"Stop this at once, Mineta!" Iida said, walking toward his classmate. "This is demeaning to both the girls and to you!"

"I now know why I have this Quirk." Mineta said, taking two of his balls and using them as suction pads to climb the wall. This was the moment his entire life was leading up to! His shining moment!

"Rototo?"

Just as he made it to the top, Mineta was faced with Dominic's Heat Rotom. The microwave oven opened up, and a red light started to emanate from the Pokemon's body. "Oh, not again!" Mineta screamed. Heat Rotom fired Overheat at the boy, engulfing him in flames before he fell ass-first onto Iida's face. Rotom was proud of its handiwork, and gave a mischievous smile to the female side of the bath.

"Thanks, Rotom!" Uraraka said, glad that the Pokemon defended them from their classmate.

Dominic had overheard Pixie-Bob assigning Kota with the job of 'Mineta Guard'. Knowing this was a stupid idea, he proposed something else. Since Heat Rotom was neither male nor female, it was the perfect candidate for this task.

OMAKE: Alternate Possibilities

Normal Form

Just as he made it to the top, Mineta was faced with Dominic's Rotom. The Pokemon started to emit electricity, and smiled sardonically at Mineta. "Oh, not again!" he screamed. Rotom fired Thunder Shock at the boy, electrocuting him before he fell ass-first onto Iida's face.

Wash Form

Just as he made it to the top, Mineta was faced with Dominic's Wash Rotom. The Pokemon raised its hose, and blue light could be seen coming from inside. "Oh, not again!" Mineta screamed. Wash Rotom fired Hydro Pump at the boy, pushing him from the wall and sending him crashing into the spring.

Frost Form

Just as he made it to the top, Mineta was faced with Dominic's Frost Rotom. The fridge opened, and a cyan light could be seen coming from inside. "Oh, not again!" he screamed. Rotom fired Blizzard at the boy, encasing him in a block of ice before he fell onto Iida's face.

Fan Form

Just as he made it to the top, Mineta was faced with Dominic's Fan Rotom. The fan's blades started to spin, swirling the surrounding wind around. "Oh, not again!" he screamed. Rotom fired Air Slash at the boy, causing him to lose his grip and fall ass-first onto Iida's face.

Mow Form

Just as he made it to the top, Mineta was faced with Dominic's Fan Rotom. The Pokemon opened its large mouth, and a green light could be seen coming from inside. "Oh, not again!" he screamed. Rotom fired Leaf Storm at the boy, causing him to be lifted off the wall and sent flying into the forest.

"Eh, he'll be fine." Dominic said, not worried for his classmate.