'It was early in the morning when Team RWBY escorted Sage, Rosetta, and Yin to Beacon's cliff for their test with Sonic and Shadow. When they reached the cliff, Ozpin was waiting for them along with Sonic, Shadow, and Glynda Goodwitch, "Morning Prof. Ozpin!" The Pure Siblings greeted the professor, "Good morning you three, are you ready?" He asked.

"You bet!" Sage said.

"I'm down for this!" Rosetta said.

"Ready to kick some Grimm butts!" Yin proudly said as she punches her other fist.

"To avoid confusion, since there are two Ruby and Yangs, call Ruby Pure, Rose or Rosetta and for Yang Pure, Yin," Sage stated and Ozpin and Glynda nodded as the Pure Siblings began approaching their uncles while the four girls stayed back and cheered him on.

"Kick some butt little brother!" Ruby cheered.

"Fight well!"

"Be careful out there!"

"Don't die!" Yang shouted making her teammates gave her a "Seriously" look, "What? I mean it."

"Don't worry, he's tougher than he looks," Sonic said.

"Let's do this!" Sage said as he did his stance.

Then, Yin was launched first, Rosetta second, then Sage with Sonic and Shadow last. After they got launched, everyone pulled out their scrolls so they could watch the initiation.

With Yin, she was in the air, using Ember Celica to rockets herself throughout the forest while laughing, she then turned around as she passes through some trees as she then jumps between trees to land herself towards the ground and rolls on contact, "Nailed it!" She said as she started running.

"She is totally me!" Yang said as she keeps watching.

With Rosetta, she hits a bird on her way down, "Birdy no!" She pulls out Cresent Rose Full Bloom as she shoots to decrease speed then transforms into scythe mode then hooked on a tree branch and went around it a couple of times before jumping down to the ground.

"Oh my Oum, we're scythe twins!" 

With Sage, he was in the air while dodging some trees heading his way, he then pulls out Blue Rose in scythe forms and held the two weapons on other directions as he then spins around really fast as he looks like a saw chopping through some trees then abruptly slows down as he goes through a tree thus slows down his launch and falls down to the ground as he did a superhero landing, "Hehe, nice." He compliments himself as Sonic and Shadow landed next to him before running through the forest as they held back their speed.

After a few minutes, the five got together and walking through the forest finding the temple while laughing except for Shadow, "And then, and then, I was at a friend's house hanging out like any friends out there and I ask him, "Hey, can I have some ice cream?" I said then he told me, "Only a spoonful." Then I decided to be a douche and pull out a giant spoon." Sonic, Rosetta, himself, and Yin laughed at his story while Shadow let out a few chuckles, "You guys should've seen his face when I did that." Yin calmed down as she wipes off a tear from her eye, "You are a smartass!" Sage lets out a few more laughs until their little moment was interrupted by a growling.

They saw 100 Beowulves

And 50 Ursas

"Odd, there should be more than this amount of these creatures," Shadow said looking skeptical.

BGM - Back To Mad - Texas fagott(SMBZ Remix)

All of the creatures roared at the five, Rosetta transforms her weapon to scythe mode, Yin prepares her Ember Celica, Sage pulls out both of his scythes and sticks both ends of the weapon making it into a double-sided scythe as he twirls it around before going into a stance, Sonic pulls out his sword and Shadow crouches down.

As the Grimms ran to the five, Sage charges in first as he flips behind two beowulves and slices their heads off, and turns into a blue rose comet as he homing attacks the five uses while cutting the monsters heads off and run towards the Grimms.

Rosetta dashes through the Grimms, slashing and shooting each one she passed, and using her semblance and homing attacks the Grimms she passes. She stops abruptly then runs around at the grouped up Grimms as a circle of Roses surrounded the black creatures, she abruptly stops as she stood outside of the circle and snaps her fingers then a tornado of roses appeared around the grouped up Grimms as the monsters got launched up in the air by the rose tornado.

(Like this)

Back at the cliff, Ruby and the others saw Rosetta's little stunt and they are beyond impress on what she did, "Woah! I didn't think that my semblance can do that!" Ruby shouted as she keeps watching her twin/doppelganger, "I want my doppelganger to train me!"

Yin was punching the Grimms and she punched one Grimm as she charges her fist and launches the Ursa towards the Beowulves, she then felt a presence behind her as she quickly turns around and grabs the neck of the Grimm wolf and slams the creature to the ground, she then notices a few Grimms running towards as she then uses the bear Grimm as a skateboard while shooting the Grimms heading her way. Then she jumps at a stone ramp as a couple of Grimms under her then stomps the Ursa towards the ground as it leaves a small crater and creates a shock wave, launching the Grimms away.

Back at the cliff, they saw Yin's little stunt and they had the same reaction when they saw Rosetta's rose tornado, "Wow! My twin packs a punch!" Yang said as her team agrees with her, "Now I really want to spar with her!"

Back at the fight, Shadow was in the air killing the Grimms with his Chaos Blade(The spirit sword from DBZ). He rips and tears(Reference?) the Grimms into pieces then dashes through the creatures with his speed boost knocking away the Grimms while killing the creatures during his speed rampage, he then teleported to the flying Grimms that Rosetta and Yin launched up as he then kicks the monsters away.

Sonic running through the Grimms while slashing the creatures he passes.

He then jumps up as the remaining Grimms are in the air, he then curls into a blue ball as blue blurs go through the creatures.

Sonic then landed between Rosetta and Sage, and Yin jumped back and landed beside Rosetta and Shadow was the only one standing a few feet away from them as there are few more Grimms remaining, "Hey Shadow, do your thing!" Sonic shouted at him and Shadow looked back at him with a smirk, "No need to tell me a faker." He said as he then glows red, "You three might want to hold on tight." The Blue hedgehog Faunus warned them as he crosses his arms in a defensive manner which made the Pure siblings confused.

"CHAOS..." The three eyes widen as they now knew what he meant when Shadow said 'Chaos', Sage, and Rosetta stab the ground with their scythes as they hold on tight and Yin holds on to Rosetta's scythe, "BLAST!!!" He then releases the energy he charges as the blast engulfed the Grimms and vaporized them.

(Best one I could find) 

The blast was so big that it can be seen back at the cliff, "HOLY MOLY!!! THAT BLAST IS POWERFUL!!" Ruby shouted the obvious.

"Just how powerful is this Shadow person is?!" Weiss asked as if Shadow was a villain.

"Now I know why he said that he and Sonic can take on millions of Grimms by themselves, this is ridiculous!!" Yang shouted with fear and joy in her voice.

"I just hope that Sage is alright," Blake said with worry in her voice.

"And not only that, did you see Shadow did to those Grimms?! That was totally badass!!" Yang said with extreme joy in her voice as Ruby then quickly pulls out the Swear jar, "Swear Jar." Yang groaned and put a single lien in the swear jar that Ruby was holding. Blake was silent the whole time as she watched. She was proud of Sage for his fight but was now very curious about Sonic and Shadow, 'Ozpin was right, those two can actually fight and Rosetta and Yin have little bit more experience than Ruby and Yang. Wonder what they went through.' Blake thought as she looks back at her scroll.

Back at the forest, the blast died down, the Grimms are reduced to ashes and not a single one remained and the Pure siblings are completely covered in ashes and they coughed out dust, "I jUsT sAw ThE LiGht ANd iT pUNch mE in tHe FacE." Sage dizzily said, "Dad, I doN'T WanT anYMore COokiES." Rosetta dizzily said, "PleAse, AUNtie ROuGe, I dON't waNNa ShOP fOr MOre CLOtheS." Yin said before the Pure siblings fell backward out of dizziness and Sonic just laugh at their reaction, "First time seeing that trick?" Sonic asked them as Sage stands up and wipes off the dust on his body, "Yeah, not using it." He said boldly.

Rosetta and Yin stood up and shakes off the dust on their bodies, "So, is that all of them?" Rosetta asked as Shadow then said, "Somethings not right." Yin raised an eyebrow as she then asked, "What do you mean uncle?"

"There should be more of them than this few, it's like they just vanished." Sonic then smirks proudly as he said, "Maybe they got a hint not to mess with us and ran back home to their mommy." Sage cockingly smiles as then said, "Or maybe they got scared and killed themselves by jumping off a cliff." He and Sonic high-fived at each other and stars appear above their heads as Shadow then gave the two blue fighters his signature stare and the Pure sisters just giggles at their childish persona, "I don't like this, stay on guard just in case." All of them nodded as they head to the temple and saw chess pieces, "Chess pieces?" Sage asked as Yin grabbed a black knight piece, "How about a cute little pony?" She said as she raised the piece up in the air and the two rolled their eyes as they took the same piece.

They then continued through the forest until they came face to face with a tall cliff, "Hm, where to go?" Sonic asked as he puts his fingers on his chin, Sage then notice a split between the cliff as he then proceeds to scale the wall by jumping from one side to another.

"Good thinking kid," Sonic said as he sticks himself on the wall and proceeds runs to the top, Shadow just casually teleports to the top, Rosetta grabs her weapon and transforms into the scythe form as she then steps at the blade and shots herself upwards and Yin did the same thing as she readied her shotgun gauntlets and shoots the ground as she rockets herself to the top.

"Well, that was easy enough." Yin said as she then saw Sage holding his hand up as if he was asking for a high-five and Yin slapped his hand, they then heard a growl deep within the forest as another 50 beowulves appeared, "Great, another gang of these mofos." Sonic said and before the five attacks the creatures, a few missiles and energy bullets got launched towards the monsters killing every single one, "Woah, who's killing the Grimms out of nowhere?!" Yin asked and before anyone could answer, a red bulky robot with an omega symbol on the right shoulder guard landed out of nowhere.

"H E L L O   E V E R Y O N E , E - 1 2 3  O M E G A   R E P O R T I N G   F O R   D U T Y."

"OMEGA!?!?" They all shouted, surprised that he arrived helping them, "Omega, what are you doing here?" Sonic asked the robot and he said, "I   S A W   T H E   G P S   C O O R D I N A T E S   F R O M   S H A D O W ' S   I N S T A G R A M   P O S T." Sage then turns his head to Shadow as he then asked, "Wait, uncle, you had an Instagram account?" He then pulls out his scroll as he taps on the Instagram app, "How come I never saw your profile name. What's your profile name? I'm gonna follow you." Shadow then proudly smiles then said, "ShadowTheCoolest48." Sage's eyes rolled then smiles, "You and your ego, and followed."

"A N D   I   K N E W   T H A T   I   W A S   N E E D E D   B E C A U S E   O F   T H E   T R E N D I N G , # I  M I S S   O M E G A ' S   M I L K S H A K E S." Omega's chest armor opened as he then pulls out a big tray with several different flavors of milkshakes with different toppings, " S O   I   H A D   B R O U G H T   S O M E   F O R   E V E R Y O N E." This made the five surprised and happy, "D O N ' T   N O T   F R E T. " 

Sonic then grabbed a milkshake with whipped cream, chocolate chips, and rainbow sprinkles on top, "A way to come through it, dude!"  He compliments the robot, Yin grabbed a strawberry milkshake with ice cream on the top, chocolate sprinkles, a strawberry sticking at the side, and a wafer stick as a straw, "Thanks Omega, you're the best!" Yin compliments Omega.

"You got the hook up on that "Cookies and Cream" Boi? For me and Ruby?" Shadow asked for cookies and cream milkshake and Omega gave the two their order, " Y O U   K N O W   I T   B R O." Shadow grabs the drink and took a quick sip, "Thanks, dude."

"What about the fresh from the spot  Mastani Mango Milkshake?" Sage asked then Omega grabbed Sage's favorite fruit drink, " Y O U  K N O W   I T ' S  Y O U R   P R I M E T I M E   F A V O R I T E." Sage then took the drink and quickly sips the drink with a straw, "Your milkshakes are the best Omega!" He compliments the robot, "T H A N K   Y O U   F O R   Y O U R   C O M P L I M E N T S." Rosetta then notices a few more milkshakes that tray, "Hey Omega, why are they're more milkshakes on your tray?"

"I T ' S   F O R   T H E   G U E S T   W A I T I N G   A T   T H E   T O P   O F   T H E   C L I F F." He simply answered, "Well Omega, you can come with us since your here anyway." Yin told the robot as Omega then said, "I ' V E   B E E N   L O O K I N G   F O R W A R D   T O   I T."

(Timeskip)

As the six made their way to the top of Beacon's cliff, Sage was instantly hugged by Ruby, "I'M SO HAPPY THAT YOU'RE OK! THAT FIGHT WAS SUPER AWESOME!!" The rest of the Team Rwby joined in to congratulate Sage, Rosetta, and Yin for their performance when Sonic and Shadow walked up to them, "Thank you for looking out for him." Bake thanked the two hedgehogs Faunus as Shadow crosses his arms as he then said, "Our pleasure." Sonic gives them a thumbs up.

"So, who's this guy?" Yang asked as she pointed at Omega while Sage, Rosetta, and Yin drinking their milkshakes, " I   A M   K N O W N   A S   E - 1 2 3   O M E G A,   A   C O M P A N I O N  A N D  F R I E N D   O F   S H A D O W   A N D   F R I E N D S." Omega said as Sage then stops drinking his milkshake, "By the way, Omega wanted to give you guys something too, go ahead big guy." Omega's chest armor opened up and a big tray slides out of the robot revealing the milkshakes, " I   B R O U G H T   M I L K S H A K E S   F O R   E V E R Y O N E." This made Team RWBY, Ozpin, and Glynda surprised and happy as they grab a milkshake of their choice.

Ruby's

Weiss'

Blake's

Yang's

Glynda's

Ozpin's

"Thank you Omega." Weiss thanked the bulky robot as Omega bent a little bit forward saying 'your welcome' to the heiress, "Wow! This milkshake is super delicious!" Yang said as she continues to drink her milkshake, "I agree, for a robot, he sure can make good milkshakes." Glynda said as everyone walks back to the academy, "You three will be called Team SPR(Super, welcome to Beacon."

To be continued...

Next Chapter - First day