The brightly colored drawing features the Equestria Girls, a group of six friends and the canine Spy, standing in a line. Spy the Dog is in the middle, wearing his signature blue bandana, with his paws lifted and hints of a happy smile on his face. The girls all appear to be gazing at Spy, smiling back, and are dressed and accessorized to the nines.
To bring these characters to life, I suggest using bright colors - oranges and yellows to further enhance Spy's dynamic movements and attention, and cool colors - blues, greens and purples to give the girls a more youthful, relaxed vibe. For the background, use a muted hue of any color to create a smooth, dream-like atmosphere. Finally, use white highlights and dark colors for definition and depth to the scene.