Wow, this art is old. It perfectly describes my 2010’s teenhood.

“So, Twilight, you’re telling me you guys were stuck in some labratory with a ‘portal gun’, then Pinkie decided to shoot a portal at another portal with said gun, causing a wormhole to appear and lead to…whatever the name of the place you grabbed these forest critters from?”
 
“I know it sounds stupid, Spike, but that’s exactly how it happened!”
 
“Oh, I believe you, I’ve seen Pinkie cause much weirder things. It’s Princess Celestia who won’t believe you.”
 
“Yeah…maybe we should just ditch the whole letter-writing bit and just go to Celestia.”
 
“I was hoping you’d say that. Explaining in person would be far more believable.”

After watching HTF and then MLP, it seemed to me that the art styles were similar enough that characters from the one universe would likely feel at home in the other.
 
I wonder how Pinkie and Flaky’d get along.
 
Looks like Fluttershy needs to keep an eye on Flippy and Angel. Her pet rabbit could be in for more than he can handle.

Either this will be the only episode NO HTP animal dies, or there will be a biblical bloodshed.