"Pinkie?" Rainbow Dash asked, confused, willing herself forward through the empty darkness around them. "Is that you? Why do you look like that?"
Pinkie turned towards her, a little surprised. "Rainbow. You're not my Rainbow though, and I'm not your Pinkie."
Rainbow paused. "Oh. Mirror world stuff?"
Pinkie nodded.
"So that's what a human looks like." After a moment Rainbow shook her head. "Nevermind that, what are you doing here? Do your friends know you're in Equestria?"
Pinkie gave her a weird smile. "Don't worry about them, I'm safe here. And besides..." Reaching towards Rainbow, she moved her arm through the pony's torso, her hand coming out behind her neck. "I'm not really here."
Rainbow drew back, a bit confused by that. "Okay. That's weird. I'll probably have to tell Luna about it." She looked around. "This whole place is weird. What's going on here, exactly?"
"Oh, nothing in particular." Pinkie floated around in the darkness. "I was just catching up with an acquaintance of mine." As she said so, the shadows around her body seemed to shift, ruffling like feathers and caressing the edges of her skin.
Rainbow opened and closed her mouth once. "Yep. Definitely weird, definitely telling Luna about this." She drifted a little closer to Pinkie. "Are you sure everything is okay?"
"Okay?" Pinkie looked at her with wide open eyes and took a long, deep breath, inhaling shadowy tendrils of the darkness around them. "Things are going far better than just okay, Rainbow," she whispered in a breathy tone. The shadows had grown claws, and were tugging and pulling at Pinkie's lips and other bits of her anatomy Rainbow couldn't as easily trace back to the more familiar equine bodies she was accustomed to, or merely wandering over her skin.
The pony looked at Pinkie's eyes, and moved back a little, swallowing. "Pinkie, uh, I'm gonna be straight with you, this doesn't really look okay to me." She held back from summoning her armour, but she was ready to do so at any moment.
"Oh, Dashie, don't be silly." Pinkie moved towards Rainbow with speed and motions that looked unnatural even for a creature Rainbow had never seen before moving through void blackness. She stopped with her upside-down face just a hair's breadth away from the pegasus', and while Rainbow knew Pinkie couldn't touch her she suspected that was probably not true for the shadows slithering around over the girl's skin and wrapping around her limbs. "You being straight with me? What kind of nonsense is that?" Pinkie opened her mouth, but what came out was closer to a frantic series of pants than to laughter. That was until a thick stream of darkness and shadows began to pour into her mouth and down her throat.
Rainbow swiftly pushed herself away, and she did summon her armour. Breathing fast, she stared at Pinkie and tried to think of what to do. Parts of the girl's body were fully enveloped by darkness, like fabric coating her limbs, and behind her what looked like a pair of black wings almost seemed visible. Then Pinkie's eyes began to glow a deep dark black and purple, and before she could react Rainbow Dash blanked out.