(ahem: History might not be that accurate...just go with it, unless you see something glaringly silly)
The plot of silliness.
"Gentlemen...I ask you, what has been our most dangerous obstacle for the invasion of Pekopon?" Keroro asked, pacing up and down the meeting hall.
"Here we go again..." Giroro grumbled.
"I'm guessing her name begins with a Na and ends in Tsumi." Tamama sniggered.
"It is the Hinata family!" Keroro boldly announced. A picture of the three Hinatas appeared on the giant screen behind the sergeant. "But...what makes that family such an obstacle?" He mused.
"Is it that we just suck?"
"Shh, Private...It's because of their DNA!" The screen changed to a 3D image of a double helix with some strands highlighted. "And we now have a way of discovering exactly what makes them strong (well, not counting Fuyuki-dono) and fighting them back!"
"How about a bullet to the head?" Giroro kindly suggested.
Kururu ascended from a hole in the floor, with a machine looking very similar to the double helix on screen.
"Ladies and gentlemen!" Keroro sang "I present to you the Bridging the Generation Gap- atron! With this, we will discover whom the Hinata, Nishizawa, Azumaya, and...what-ever-Saburo-dono's-family-name-is ancestors are. And with that, we will find their weakness!"
"That's...not a half bad plan." Giroro reasoned.
"Very well, I PRESS!" Kururu pressed the single red button on his good-for-everything remote.
The helix began twisting, slowly getting faster with each spin. It revolved until it turned into a whizzing blur of colour, sharp blue electricity sparking in every direction. "Is it supposed to do that?" Keroro squealed.
"Probably." Kururu answered with a casual shrug.
The helix span and span and whizzed and buzzed until it exploded in a bright cascade of white light. Keroro flinched away until the light dimmed and he could see again. He had to blink several times to be confident that his large eyes weren't deceiving him.
Five human bodies lay unconscious on the hard tiled floor. But what was more frightening was that it was his human friends. Perfect copies of Fuyuki, Natsumi, Momoka, Koyuki and Saburo. But they were all wearing odd clothes. Really odd.
Fuyuki was clad in shiny armour of a medieval knight, long sword clasped in his gauntlet. A big shield hung on his back, grandly decorated with a standing red dragon.
Natsumi was wearing a bright, woollen, primitive floor length dress, and a blue shawl around her shoulders. Two dull-looking bronze battle axes were attached to a leather cord tied around her waist and a gold circlet patteren like twisted rope donned on her forehead.
Momoka was wearing the most flamboyant attire; a short sleeved, off-white shirt with golden buttons, slim-fitting violet breeches with worn and threadbare knees, a crimson cotton waistcoat with a gaping slash on one side, a tri-cornered leather hat sporting a flamingo feather. What was most odd was the eye-patch over her left eye and the cutlass hanging from a wide magenta ribbon around her waist.
Saburo was wearing deep sapphire, short sleeved coat-like garment, with padded shoulders, over a pure white, long sleeved shirt with puffy sleeves and velvet breeches. A rich scarlet beret topped his head, and was decorated with ornate, thin, silver stitching. Instead of a weapon, like the others had, he had a well-used paintbrush sticking out of his breeches pocket.
Koyuki was nothing but a streak of night black, clad in a floor-length cloak with a hood over her head and a grey mask over her petite mouth, reminiscent of Dororo's mask, but was several shades darker. Much like Fuyuki's doppelganger clung onto his sword, Koyuki's gripped a stained kunai, ready to use in a heartbeat.
"Wh-Wh-Wh-WHAT?" The green sergeant shrieked. "Kururu! Did you...clone them and dress them funny or something?"
"I did exactly as you told me to." Kururu snickered "I found out whom their ancestors were...ku ku ku, I just didn't bet that I found out a way to bring them into the present day!"
"She's...Natsumi's ancestor?" Giroro muttered, enthralled by the warrior-ess's beauty as he is often is by his own Natsumi's beauty.
"Will they be alright?" Dororo asked, kneeling by the unconscious ancestor of Koyuki.
"Ku ku ku, probably."
And with that, Fuyuki's ancestor began to stir. His eyebrows knotted into an ill frown and he mumble incoherently. When his eyes opened, Keroro noticed that the colouring was wrong; fire-like amber instead of ocean blue. And then they settled on Keroro...and then looked around the base. And then with a startled yelp, sprang to his feet, armour clanking noisily, and held his sword in defence. He said something, but it an odd language.
"Gero...? What was that now?"
"Ku ku ku...Ye Olde English, Captain." Kururu snickered, tossing a anti barrier onto his the startled knight's shoulder.
"Where am I?" Keroro understood what he was saying now "What are you...? W-woodland spirits?"
"Um, no. Keronians...And, you can put the sword down, we're not going to hurt you."
A moment hesitation, and then he lowered the sword, but didn't lessen his grip.
"Where have you taken me, Ker-oon-ee-an?" He said with such authority that was never, ever heard from the present day Fuyuki.
"First, that is not how you pronounce it. And you are...in the future!" Keroro beamed.
The knight gazed around in silent amazement "Is this...my kingdom?"
"Gero?" Before Keroro could ask anything, the knight dived towards the still unconscious ancestor of Natsumi.
"Are you alright?" He cried, shaking her lightly. He then took in the sight of the unconscious others. "Are they all hurt?"
"Ku, ku, just sleeping- like you were." Kururu tossed anti barriers onto them to avoid any language difficulties when they awoke- which they did moments later.
"WHAT ARE YOUR NAMES, PROFESSIONS, COUNTRYLAND AND WHAT IS THE YEAR?" Kururu boomed, via a enormous megaphone, which made Giroro's ear drums pop like ripe grapes (yet strangely had no affect on any one else).
"I am Boudicca!" Natsumi's ancestor roared over the echoing hiss of the megaphone "Queen of the Inceni tribe. I am of England and the year is 60 AD."
"I am Grace Bloodletter." Momoka's ancestor announced "Pirates and captain of the infamous Angelic Cutlass! I've been exiled from my homeland of Ireland and its 1655 AD, red-haired fool."
"Bounjourno! I am Leonardo." Saburo's ancestor cut in, before Boudicca and Grace took their weapons to each others' throats "Leonardo da Vinci from belle Italy...And I do believe its 1467 AD."
"I am known as Kunai." Koyuki's ancestor growled "And that is all I will tell you."
"Oh, and I'm Arthur." Fuyuki's ancestor chipped in "I'm a knight of Camelot...and I'm from the year 489 AD."
And then, as if on cue;
"STUPID FROG!"
"Oh...hell. Quick, HIDE!...No, not in here, that's my Gundam room!"
(Dates are REALLY rough, so no flaming for that please.)