Saban owns Power Rangers; I am not Saban. Ergo, I do not own the Power Rangers.

Ten: Change (pre "Fighting Spirit")

"Why exactly did Dr. O. schedule a training session?" Ethan protested as the four teen Dino Rangers headed down into the Dino Lair. "I mean, he's invisible. He's the Invisible Man. We can't train against that!"

"He'd cream us," Conner had to agree. "I mean, how can we beat what we can't see?"

"You're forgetting that Dr. O. usually creams us anyway," Kira noted dryly. Ethan glowered at her while Conner and Trent both looked sheepish. For them, 'usually' meant about half the time while for Kira and Ethan it mean five-sixths of the time.

As they entered one of the spacious, dome-roofed but egg-shaped training rooms in the Dino Lair they looked around knowing that even if Dr. O. was in the room they wouldn't see him. Scratching the back of his neck Conner called out, "Dr. O.?"

"Here," came his voice from the center of the room. Ethan cracked, "Here where?"

"Not funny, Ethan," sighed Dr. O. Ethan retorted, "If you thought that wasn't funny how about this: how could you use the bathroom when stuck morphed?"

Kira and Trent shared a tired look while Conner looked earnestly curious.

"That's a good point, Ethan."

"I know, right!"

Kira and Trent could almost see Dr. O. do a face-palm.

"My biological processes were in statis while I was morphed, as all of yours are as well. Technically as long as you're morphed you're trapped in time."

"So… if I'm morphed I don't age?"

The other three looked at their elated leader.

"Conner…" they all groaned. Dr. O. got his students back on track.

"Here are today's pairings for training: Conner versus Ethan and Kira versus Trent."

The four exchanged surprised looks. Usually he paired off Conner and Trent, leaving Kira and Ethan to battle one another, so that the two could work out their issues. Or rather, Conner's issues towards Trent.

"Don't look at me like that!" Dr. O. protested. "So just go spar!"

"Uh, Dr. O. In case you forgot we can't see you, let alone look at you," Conner cracked. The others definitely could hear Dr. O. do a face-palm.

"Just… go… spar… already."

Conner and Ethan moved off and began to battle. Dr. O. called after them, "No morphing! If I can't morph neither can you guys… at least while training."

Kira and Trent exchanged an uneasy look. Dr. O. informed Trent, "Be careful. Kim and Katherine always squished me in training."

"Kira and I aren't- I mean I wish- but we're- She just- what?"

"Trent's just- we're only- I'd like- I and Trent like- AAHH!"

Now both seniors were flushing bright red. Then they exchanged a determined look, and judging from where Dr. O.'s voice had been coming from they tackled him.

"Ack!" he went as all three tumbled to the floor. Rolling over Trent went into camouflage mode and focused. Now he could make out Dr. O.'s outline since now both were in the 'invisible' world. He started to attack his mentor, kicking and punching almost playfully. Luckily Kira could make out Trent's outline as he only matched his background so against shifting backgrounds she could make him out. Using him as a measure she aimed her sonic screams at their mentor and then moved in for some blows.

Noticing the battle Conner and Ethan halted their own. They exchanged grins.

"Shall we, Ethan?"

"Of course, Conner."

Using their super speed and super endurance the two joined the battle. At last Dr. O. laughed, "Alpha, Alpha!"

The others understood this to be the Power Ranger version of 'uncle' so they all halted their attacks and laid down on the dusty floor. The four teens laughed hilariously . Sounding still very close by Dr. O. commented, "I think that was enough training for now…"

"Uh-huh," concurred Ethan. Conner looked over at Kira and Trent.

"Why did you two attack our poor mentor?"

"No reason," they chorused, blushing. Even though he was invisible, both knew that Dr. O. rolled his eyes at their fib.