Spike (EG)

Spike's dog counterpart that first appears in the post-credits epilogue in My Little Pony Equestria Girls: Rainbow Rocks. He is Twilight Sparkle's human counterpart's dog.

''My Little Pony Equestria Girls: Rainbow Rocks
After the credits roll, the human world's version of puppy Spike appears alongside the human world's Twilight eating some dog food from a bowl. Unlike Spike the Dragon, puppy Spike only barks.

My Little Pony Equestria Girls: Friendship Games
Spike's Equestrian counterpart does not appear in the movie, but Spike's dog counterpart from the human world does appears along with Twilight's human counterpart in the film. As he was depicted in the post-credits scene of Rainbow Rocks, Spike the Dog is depicted as being non-sentient and only able to communicate like an actual dog. Both Rarity and Fluttershy recognize him when he appears out of Twilight's backpack. Spike shows much concern for Twilight throughout the film, as he dislikes Canterlot High and worries about Twilight's trip there.

Once Twilight's medallion absorbs Fluttershy's magic, causing dimensional rifts to Equestria, Spike follows a jackalope through one of the rifts and is accidentally exposed to some of Fluttershy's magic, which gives him the ability to talk. During the climax of the film, when Twilight transforms into the evil Midnight Sparkle, Spike calls out to her and gives a pleading look, momentarily bringing her back to her senses so Sunset Shimmer can turn her back to normal.

Spike is present when Twilight's Equestrian counterpart appears from the portal, happily wagging his tail at the sight of a second Twilight Sparkle.

Pinkie Spy
In this short, Pinkie has a mask of Spike the Dog when posing as a "dog burglar".

Quotes
"Hey, Twilight, any idea who you wanna sit next to on the way back? I already have a waiting list."

- Dog counterpart, My Little Pony Equestria Girls: Friendship Games deleted scene