Makes sense.

Sure!
Is that allowed?

Chapter 15: Chickening Out
The yelling, clashing, fighting, and tumbling jumbled together and created a loud noise roaring in Andrew’s ears. The sound began to die down as Andrew focused on what was to come. He charged toward the battle, raising his sai into the air, preparing to fight.
A couple nindroids noticed his charge, and proceeded to run towards him. Realizing the impending danger, fear took control of Andrew’s mind as he turned around, squealing like a piglet. He ran as fast as his legs could go, trying to find someplace to hide. The loud clomp-clomp was heard behind him as the nindroids marched behind him, followed by a few pews as they shot red lasers toward him, making him scream even more.
Finally, Andrew jumped into a bush. Thorns, twigs and branches poked into his ribs, but he was too scared to notice. What was he doing? He was supposed to be a ninja! Ninja were supposed to fight! Why was he chickening out?!
Suddenly, Andrew had an idea. He would chicken out – literally! “How did I become a cat again?” He wondered silently.
Remembering the details, he tried to imagine the form of being a chicken. Feathers would grow from his skin, his nose would harden and point into a beak, and his body would begin to smash together until he was a few feet smaller. He looked at his body. “Yes!” he thought – it had worked!
He then hopped out of the bush – well, tried to. The twigs and thorns in the bush clung onto his feathers and held him back. “Hey! What’s the big idea?!” He tried to yell.
“Cluck-cluck-cluck buh-caw!” Came out instead.
The nindroids turned around to face Andrew. They stared at him for a few seconds, then shrugged and ran back off to the ongoing battle.
Andrew kept trying to jump from the bush, yet the thorns continued to grab his feathers and hold him back. Finally, he mustered all his strength and jumped out from the bush, though not without the loss of a few feathers. “Ow.” He clucked.
He, following the nindroids, ran back out onto the battle, fluttering his wings violently. The park was horrendously hectic. Shouts, yelling and several “hi-yahs” were heard amongst the deafening roar of clashing metal, sparking lightning, and fizzing spinjitzu vortexes. Andrew’s odd four-toed feet pounded across the grass, charging towards the fight. Finally, he found himself in the midst of it, excitement bumbling everywhere. Had the nindroids known who he was, surely they would have fought him, yet they didn’t. After all, who would choose to battle a chicken? (In retrospect, a chicken probably was a bit of an odd choice.)
Andrew ran towards a nindroid and suddenly pecked his feet. The metal tasted slightly gross, yet he continued, ripping out wires and metal pieces. The nindroid, caught up in the battle, didn’t notice at first, but soon stumbled, and looked back at his foot and saw a large portion had been ripped off. He tried to push himself back to his feet, but lost balance again and fell the other way.
Before long, half the nindroid army had missing feet. “Is anybody else noticing some of the nindroids just seem to be squirming on the ground?” Lloyd asked as he kicked an incoming black nindroid, sending hum stumbling into an unstable park bench.
“Yeah, it’s weird!” Jay said before he spun into a blue spinjitzu vortex, sending two nindroids flying behind Zane’s statue.
A few minutes later, the park was covered in black metal, broken gears and parts, and ripped wires. “Did we just . . . defeat them all?” Nya asked rhetorically in disbelief.
“Y’know, it’s a good thing Zane isn’t here; this would look pretty disturbing to him.” Jay noted jokingly.
“Hey!” Lloyd shouted. “Another nindroid!”
The ninja began to run towards it, but they suddenly stopped. Somebody was already taking care of the robot – that “somebody” was a chicken.
“. . . why is a chicken pecking the nindroid’s foot?” Nya asked.
The nindroid, like the others, suddenly lost balance and fell upon his face. The chicken turned around to face the ninja. Suddenly, it began to break out into dance – not just any dance, but none other than what is referred to as “the funky chicken.”
The ninja stared in pure disbelief. They had seen some odd stuff before, but this had to crown it – a dancing chicken. Suddenly, Jay burst out in hysterical laughter. “That has got to be the funniest thing I’ve ever seen!” He cried.
“That has got to be the weirdest thing I’ve ever seen.” Nya stated.
After thinking for a moment, Misako asked the chicken, “You wouldn’t happen to be Andrew, would you?”
The chicken grew brown, wavy hair as its feathers shrunk and morphed into yellow skin and he became a boy. “Of course not!” Andrew declared.
Lloyd slapped his face. “This is getting too ridiculous.”
“Too hilarious, you mean.” Andrew corrected.
“Andrew, you must stop these foolish displays!” Wu shouted. “This is becoming ridiculous!”
“Oh, come on! I helped the team! I took down about half the nindroids!”
“But as a chicken, though? Why a chicken?” Nya asked.
“I mean, look at this!” Andrew directed. “Sure, a lot of these guys were defeated by you, but I immobilized half the army! I did amazingly! Look at all this black metal! It’s just-” He paused upon a certain piece of black metal.
It wasn’t black metal – they were black robes.
“Cole?!” The ninja shouted.
They ran to his body, limp upon the ground. “Oh no!” Nya cried. “Is he okay?!”
Lloyd slowly pulled part of his robes, covering his chest. A terrible gash was shown.
“That doesn’t look good.” Andrew stated.

* * * * * * * * * * * *

“Well, although he’s currently unconscious, we can assure you, your friend will be okay.” The nurse stated. “We can heal his injury, and he should be awake again soon!
“Like your fiery friend, he’ll need a bit of time for that wound to heal, but no worries; we assure you he’ll come out fine!”
“Thanks.” Lloyd muttered half-heartedly.
“I should’ve been there!” Kai said from his white bed. “I should’ve been there to help you guys – to help Ninjago! Ninja are never supposed to quit!”
“Ninja never quit, but they do obey doctor’s orders and let their wounds heal.” Wu stated.
“Hmph.”
“You have done us no wrong. If anything, you’re helping us by resting, so we can have you back again in the future.”
“I know, but I still feel like I should be doing something!” He began to raise his hands into the air, but he suddenly stopped and winced in pain.
“Careful, Kai!” Nya cautioned. “Your wound still hasn’t healed all the way yet!”
Kai sunk back into his covers moodily, clearly feeling useless and hating the feeling. “This is becoming ridiculous!” Jay said. “The team is getting smaller! First Kai gets injured, then Zane disappears, and now-”
“Wait!” Kai interjected. “Zane’s gone?!?! Gah!” He groaned, holding his side again.
“Don’t worry, Kai.” Lloyd soothed. “We’ll find him.”
“I have to help! I have to join you and find him! He could be anywhere!”
“Sorry, Kai, but your place is here for now.” Nya stated.
“I hate it in here, though! There’s nothing to do all day but watch soaps, because the woman beside me won’t share the remote!”
“Everything will be all right.” Wu stated. “For now, the best thing you can do for Ninjago is to stay here and rest. We’ll be going now.”
Kai slumped back to his bed. “Fine. But if you ever need some help, just-”
“Stay, Kai!” Nya interrupted.
Kai sighed and stared back at his blanket sheets. The ninja walked out of the hospital’s revolving doors, and Lloyd turned around to Andrew suddenly. “A chicken?!” He shouted. “Seriously?!”
“It was the first thing to come to mind!” Andrew defended.
“You could’ve been anything!’ Jay yelled. “A tiger, a dragon, a goblin, anything, yet you chose a chicken?!”
“I didn’t know how to become a tiger!” Andrew declared. “I don’t know what it’s like!”
“But you know what it’s like to be a chicken?!”
“Everyone, stop!” Wu shouted.
The ninja stood up straight and looked at their Sensei. “There is no use in ridiculing his choice.” He stated. “Although it was, admittedly, a bit of an odd idea, it helped us win the battle, which makes it a good idea.”
“The Golden Weapons helped us win the battle against the Skeletons in the Skeleton Mines, yet you said it was a bad idea.” Jay pointed out.
“That was a different situation entirely. Let us return to the temple as we were, and ignore the oddity of recent events. We have won the war.”

Why wouldn't you want number three?

For some reason, the funniest part in this last section is this.