Apple Bloom appears in Equestria Girls for the first time with Sweetie Belle and Scootaloo when Twilight Sparkle is singing This Strange New World (song) next time she is seen is when she is in the library with Scootaloo and Sweetie Belle (humanized version of the CMC). Apple Bloom is seen in the Equestria Girls (Movie Song), as well as the song This is Our Big Night.
She is around the age of the younger ponies/humans, so she it is thought that she is a high school freshman in the movie. Even though she is in Elementary school in the show.
Human Apple Bloom wears her signature pink ribbon in her hair, a green shirt, jeans and orange galoshes. At the Fall Formal, she is wearing a sleeveless lace-trimmed lavender-coloured dress with a light violet ribbon around the waist. There is a flower in the middle of the ribbon, which might be a reference to her name (Apple Bloom.)
She is also scheduled to appear in My Little Pony Equestria Girls: Rainbow Rocks.
Sweetie Belle and Scootaloo are Apple Bloom's best friends. All three are in the Cutie Mark Crusaders group.