Surprise

Surprise is a female Pegasus pony and a member of the aerial acrobatics group, the Wonderbolts. She first appears in The Ticket Master. She is not named in the show, but she is named in merchandise.

Design
Surprise has the same coat and mane colors as Lauren Faust's concept art of Pinkie Pie, based on a G1 Pegasus mare also named Surprise; as a female Pegasus from the IDW comics', who appears in a flashback as a filly resembling G1 Baby Surprise; as the Pegasus mare Breezie from the fifth wave of mystery pack toys and collector cards; and as the Heather Nuhfer Pegasus mare from the IDW comics'. Surprise also shares her mane and tail style with "Blaze".

Depiction in the series
Surprise first appears in Rainbow Dash's imagination in The Ticket Master alongside Soarin and "Blaze". Rainbow imagines herself impressing the Wonderbolts that they let her join. She later appears in The Best Night Ever, once again in Rainbow Dash's fantasy of flying with the Wonderbolts as well as in the Wonderbolts' VIP section at the Grand Galloping Gala.

Surprise, with her mane a darker shade of yellow, appears as one of the Pegasi fighting against a monstrous Spike in Secret of My Excess, alongside "Blaze" and "High Winds". Spike traps her and her fellow Wonderbolts inside a water tower. Near the end of the episode, when they're finally freed, Surprise trembles with fear before striking a heroic pose and flying off with "Blaze" and "High Winds".

Surprise later appears with her usual mane color in Rainbow Falls, watching the Cloudsdale cheerleaders.

IDW comics
Surprise appears in the IDW comics', on pages 18 and 19.

Magazines
Surprise appears in a Panini My Little Pony magazine story that is titled Les surprises de l'amitié in the French magazine and Das Überraschungsfest in the German magazine.

Software
Surprise appears in Twilight Sparkle: Teacher for a Day.

Early previews of Gameloft's mobile game included Surprise, misidentified as Soarin and Fleetfoot.

Merchandise
A miniature collectible of Surprise, called simply "Wonder Bolts pony", is included in the Miniature Collection's Cloudsdale Set with Rainbow Dash and Gilda the Griffon.

Surprise appears on multiple posters, including a 21-character poster and the fan-designed WeLoveFine art print "Everypony".

A list of Wonderbolts on page 34 of Little, Brown's My Little Pony Friendship is Magic official guidebook My Little Pony: The Elements of Harmony includes the name "Surprise" without specifying Surprise's identity.

Surprise is identified on her Enterplay collectible card game card α #50 R, which gives her the description "One of the more elusive members of the Wonderbolts, Surprise has never been seen in public without her uniform on. Her teammates all say she is an absolute blast to hang out with." In the game's Crystal Games expansion set, card #45 R gives Surprise the description "Surprise works well with the rest of the Wonderbolts during performances, but the rest of the time there's no telling WHAT this mare is going to do next!"

Promotional material
Surprise appears in various promotional images used online, including by Hasbro and by the Hub Network.