@Poptard  
the mirror transform those who pass through on something is there, a dragon pass the portal but no dragon in the human world, so this why Spike a be transform a dog, but if winona pass the portal she will not be transformed by the fact she in equestria too, so two winona, those who live in the human world who go in the portal will be transform as the counterpart but if the one pass the portal is the same race in both world like a dog like winona will not transform, the dog of the human world go and transform as dragon will not work, only if their counterpart is a dragon but if a dog is will be a dog! and is the same for the other animal who pass the portal!

@Vree  
who? he the one with the dick and winona a the vagina!

Protect your ass, Spike!

Fun fact: If Winona ever fell through the portal, she’d become a dragon.

Dawwwww she just wants to meet you, Spike. X3c

In before at the least five deleted comments within half a year. ;3

“Look Twilight, I know what she’s thinking. I know what she wants. And she knows I’m vulnerable.”  
“I’m sure you’re overreacting, Spike.”  
“I am a dog Twilight! Do you think I don’t know what Winona wants to do to me?!”

Aww, I bet Winona just wants to lick your face, Spike.

Too adorable!

Winona is getting a pretty good view there.

“I need an adult!”  
“Well, if she’s gone into heat, then she’s clearly—”  
“I need a sapient adult!”  
“This body is still pubescent, so technically—”  
“Twilight, this isn’t funny!”  
“Judging by how Pinkie Pie can’t stand up over there—”  
“You’re impossible, you know that?”

She wants the Dog.

Run spike run like your life depends on it!

Twi: I think she likes you, Spike.