The most up to date version of this contest's rules is at https://www.fimfiction.net/group/217156/portal-transformations/thread/529551/portal-transformations-contest-announcement-and-rules. Please ask your questions there.

Welcome to the Contest

"When Spike goes through the Mirror Portal from Equestria to CHS, he turns into a dog. What does X turn into when X goes through the Mirror Portal (or a similar portal)? You can pick X and the direction."

Myself (Mockingbirb), I'm especially interested in changes that are less usual, not so commonplace (although I suppose very unsual treatments of the 'usual' changes can be interesting too.)

You can see some examples of different portal transformations HERE (group's front page and folders) and HERE.

If you want a new story idea, something that no one has ever written before, 'portal transformations' can provide a practically infinite number of them.

FULL CONTEST ANNOUNCEMENT AND RULES HERE: https://www.fimfiction.net/group/217156/portal-transformations/thread/529551/portal-transformations-contest-announcement-and-rules

Contest results are now available!

https://www.fimfiction.net/group/217156/portal-transformations/thread/537644/portal-transformations-contest-results

7922631

“Twilight, why did you bring me to the caves under Canterlot?”

“Look.” Twilight pointed to a portal in the world. “Maund found it this morning.”

“What does the inscription say?”

“It’s in olde tongue. It says, Only dragons may enter.”

“I see…” Spike sighed. “Well, let’s get this over with.” He entered.

On the other side, he found himself changed. On the wings of paper, he glided around the box with the inscription: ‘Here be dragons.’

An enormous human child looked at him and said, “If you’re a dragon and you came out as a paper dragon, what will happen if I put paper in the box?” He proceeded to shove newspapers into the box.

Spike did not know what would happen, so he glided into the box himself to investigate.

When he came out of the portal, he saw black clouds shading the sun. A fiery piece of Canterlot building was shoved aside, and from the hole crawled Twilight.

“I’m glad you weren’t killed!” Spike exclaimed.

“Wait until Celestia finds out about this dragon invasion. I’m a dead mare walking...”

7922700
Nice reference.

Contest results are now available!

https://www.fimfiction.net/group/217156/portal-transformations/thread/537644/portal-transformations-contest-results