Yn uwch o bob llecyn yn Eryri, lle mae'r eira'n gorwedd fel haen drwchus o wlanen, saif labordy cudd.

High above every spot in Eryri, where the snow lies like a thick layer of fleece, stands a hidden laboratory.

Mae'r wal briddsil tu mewn yn oeri ond mae offer technolegol anhygoel yn dod â chyffro gwresog i'r fan a'r lle.

The earthen walls inside are cold, but incredible technological equipment brings a warm excitement to the place.

Yn yr adeilad syml hwn, gweithia Gareth, gwyddonydd gwallgof sydd â brwdfrydedd eithafol am dechnoleg cludo.

In this simple building works Gareth, a mad scientist with an extreme enthusiasm for transport technology.

Wrth iddi gochi ymhell uwchben, roedd Gareth yn uffernol bwysig.

As it glowed far above, Gareth was intensely important.

Roedd wedi adeiladu dyfais cludo a fyddai’n profi i'w gydweithwyr am eu camriegeg ynghylch ei allu.

He had built a transport device that would demonstrate to his colleagues their misunderstanding regarding his ability.

Roedd Eira a Rhys, ei gymdeithion ymchwil ffyddlon, wedi'u llethu gan ddirgryniad ei meddyliol am ymaflyd.

Eira and Rhys, his loyal research companions, were overwhelmed by the energetic vibration of his mind.

Wrth dalu sylw manwl i'r ddyfais, cafodd Gareth guriad cymeriad pwysig.

Paying close attention to the device, Gareth had a significant character shock.

Roedd eilediad yn anghywir, ond roedd mor hyderus y byddai'n gweithio.

The circuitry was incorrect, but he was so confident it would work.

Pwysodd y botwm, a pham!

He pressed the button, and bam!

Yno, mewn mŵg a disgleirio, troes ei gorff yn warth i'w esgyrn.

There, in smoke and sparkle, his body turned to disgrace amongst his bones.

Yn annisgwyl, ni theithiodd o un lle i'r llall, ond yn hytrach, roedd ei gorff wedi cymryd ffurf newydd – defaid gwyn.

Unexpectedly, he didn't travel from one place to another, but instead, his body had taken on a new form—a white sheep.

Gareth, yn meddyliol pelydrol gyda realiti newydd, nawr yn wynebu problem newydd.

Gareth, mentally radiating with this new reality, now faced a new problem.

Eira a Rhys, a oedd â storfa o wybodaeth, oedd ei unig obaith.

Eira and Rhys, who had a wealth of knowledge, were his only hope.

Ond sut allai defaid siarad?

But how could a sheep talk?

Dechreuodd Gareth, love hyd yn oed fel defaid, lawysgrifio â'i ben.

Gareth started, even as a sheep, to scribe with his head.

Teimlai ysgwydwig ei ben wrth daflu'r llwybr pŵl i'm gwyn dan ei draed.

He felt his head shake as he tossed the pool path under his feet.

Roedd sawr myfyrio apple yn y lifft fel tog sylweddol.

There was the scent of reflective apple in the lift like a substantial tug.

Eira, gyda'i llygaid mygwid, a sylwodd ar y sgrîn dargedu.

Eira, with her misty eyes, noticed the targeting screen.

"Rhys, edrychwch ar hyn!

"Rhys, look at this!"

" Gwaeddodd Eira wrth symudion Gareth fel fflach lu'mynor.

shouted Eira, watching Gareth's movements like a flash of inspiration.

Roedd y cynghrair a ryfelchwyd fel Rwman yn peri cilio.

The alliance that they fought like the Romans was resulting in a retreat.

Dilynodd Rhys, yn chwilio am bob cyfle i huno newidiadau.

Rhys followed, searching for every opportunity to harness changes.

"Mae 'na wall," meddai Rhys, wrth dalu gwedd niwl.

"There's a flaw," said Rhys, while gauging the foggy alignment.

Roedd Eira'n methu ddeall.

Eira couldn't understand.

"Dyma'r cerfwedd!

"This is the carving!"

" Clever byth yn hals, camodd trwmyn Eira am y dynadl frith.

Clever without fail, Eira stepped heavily toward the speckled prompt.

Yn gweithio erbyn y prydles, llwyddodd yn benllanw'r pwrpas.

Working against the lease, they succeeded in the culmination of the purpose.

Defnyddion nhw'r sgrifen ac, â dash chwyldro, trawsnewid Gareth yn ôl i'w ffurf ddynol.

They used the writing and, in a revolutionary dash, transformed Gareth back to his human form.

Pan gyrhaeddodd gwylwyr y cwmni i wahaddod ei arddangosiad, roedd Gareth, unwaith eto fel dyn, yn llawn cyffro a theimladau newydd.

When the company's spectators arrived to invite his demonstration, Gareth, once again as a man, was filled with excitement and new feelings.

Cydnabod tebaid o'i gydweithrediad, roedd e'n rhannu'r llwyddiant â Eira a Rhys.

Acknowledging the camaraderie of his collaboration, he shared the success with Eira and Rhys.

O'r oddeutu hwnnw ymlaen, daeth tîm Gareth yn fwy cydweithredol a llwyddiannus.

From that point onward, Gareth's team became more collaborative and successful.

Oes o dirladd defaid oedd wedi golygu'r ffordd i amseroedd newydd.

An era of sheep territory had paved the way to new times.

Roedd e'n sicr llwyddiant i bawb.

It was certainly a success for everyone.