Rainbow Falls is the ninth episode of the fourth season of Team Robot's Adventure's Of My Little Pony: Friendship Is Magic Season 4.
Pegasus pep talk
The episode opens with Rainbow Dash talking to Fluttershy and Bulk Biceps about the upcoming tryouts for the aerial relay event at the Equestria Games, with Pinkie Pie as their team cheerleader and Applejack supplying the team with apple brown bettys. Fluttershy and Bulk Biceps are enthusiastic about the tryouts, but their flying and ability to stay airborne leave much to be desired. The initial practice ends with Rainbow buried under a pile of Bulk Biceps, Fluttershy and Pinkie Pie after Bulk Biceps runs out ofmid- .
The Equestria Games tryouts
On the way to the tryouts in the town of, "Helia" and Thunderlane apologize to Rainbow Dash for not being able to compete in the aerial relay as they are competing in the sprint events; the Games' rules forbid any pony from competing in more than one event. Twilight Sparkle speaks with Rainbow Dash about her less-than-impressive team, Rainbow remarking that she's confident she'll be able to pick up their slack. Their friends are all equally excited about the tryouts for varying reasons.
Rainbow Dash and her friends enter the tryout grounds, where numerous other Pegasi and several griffons are gathered, just in time to watch the Wonderbolts Spitfire, Soarin' and Fleefoot arrive -- with their own cheering section. Rainbow Dash coaches her teammates about the qualifiers and attempts to instill some confidence in them, but their coordination pales in comparison to the Cloudsdale team of Wonderbolts. Realizing this, Rainbow Dash's own confidence begins to falter.
To help raise the team's spirits, Rainbow Dash has Fluttershy and Bulk Biceps watch Soarin' practice for the qualifiers in hopes that they "learn something". During his practice run, Soarin' is distracted by a pair of cheerleaders and clips his wing on a hoop, sending himself into a tailspin. Rainbow Dash saves Soarin' just before he hits the ground, and he's carted off with an injured wing.
Now one relay team member short and impressed by Rainbow Dash's flying, Spitfire and Fleetfoot offer the vacant spot on their team to Rainbow Dash since she's originally from Cloudsdale; Fleetfoot quickly adds that it'd only be until Soarin' recovers. Rainbow Dash is unsure about practicing with two teams at once—especially behind one team's back—but after a bit more encouragement, she accepts.
Between two teams
Rainbow Dash splits her practice times between the Ponyville team and Cloudsdale team, finding that her aerial coordination with Spitfire and Fleetfoot is much better than with Fluttershy and Bulk Biceps. Twilight starts to grow suspicious when she sees Rainbow Dash fly off every now and then. When Twilight finds out about Rainbow's secret practice runs with the Wonderbolts and confronts her, Rainbow argues that the Ponyville team will still qualify with her on it and that "it's more fun working out with the winners than the non-winners".
At that moment, Spitfire and Fleetfoot approach Rainbow Dash. They tell her that Soarin' won't recover in time for the tryouts and offer her a permanent spot on the Cloudsdale team. However, her joining the Cloudsdale team means she won't be able to fly with the Ponyville team. Rainbow Dash is excited about the opportunity, but Twilight informs her of all the ponies she'll let down if she accepts. An uncertain Rainbow Dash asks Twilight what she would do, but Twilight tells her it's a decision she has to make on her own.
Choosing not to choose
Later, Rainbow Dash appears on the tryout grounds covered in bandages and bound to a wheelchair. She feigns injury and wails about being unable to fly with either team. Twilight is skeptical of the obvious ruse.
Rainbow Dash is brought to a hospital bed, continuing to fake being hurt. When Fluttershy and Bulk Biceps check in on her, they tell her not to worry about the tryouts, having found a replacement flyer in Derpy. They also promise that, if they qualify for the Equestria Games and win gold medals, they'll give them to her. Rainbow Dash's friends leave to let her rest, and before she joins them, Twilight tells Rainbow that "choosing not to choose isn't really a decision".
In the adjacent hospital bed, Soarin' is envious of Rainbow Dash and her friends, noting that no one's visited him during his stay. When he tells Rainbow that his wing isn't hurt and that he's been benched due to Spitfire and Fleetfoot's concerns, Rainbow realizes both she and Soarin' have been lied to. As sunlight enters the room and covers a dropped flag in colors, Rainbow Dash's eyes shimmer with a rainbow-colored aura.
The magic of loyalty
Twilight and friends are worried that, even with Derpy replacing Rainbow Dash, their chances of qualifying for the Equestria Games are slim. Suddenly, Rainbow Dash walks onto the field, in perfect health, and approaches Spitfire and Fleetfoot. She tells them, and her own team, that she faked her injury so she wouldn't have to choose between Ponyville and Cloudsdale, now knowing that the Ponyville team is who she should've been loyal to in the first place.
Rainbow Dash also confronts Spitfire and Fleetfoot for lying to her about Soarin's wing just to replace him with her—which Soarin' is also displeased about. The two Wonderbolts commend Rainbow Dash for her, saying that they could learn a lot from her, and invite Soarin' back onto their team. As the Cloudsdale team flies off, Rainbow Dash and the Ponyville team join them.
Just as the Cloudsdale team finishes qualifying for the Equestria Games, the Ponyville team begin their own qualifying run, with some encouragement from the Cloudsdale team and cheerleaders. Despite a bit of fumbling with the horseshoe baton pass, Rainbow Dash speeds for the finish, and Ponyville just barely succeeds in qualifying for the Games. As Rainbow Dash, Fluttershy, and Bulk Biceps are awarded medals for qualifying, Spitfire also gives Rainbow Dash a Wonderbolt pin.
In the Golden Oak Library, Rainbow Dash writes her latest lesson in the Mane 6's journal, reflecting that while she enjoys winning, her love and loyalty to her friends will always come first.
Rainbow hangs her medal and Wonderbolt pin on the journal's lectern before joining her friends outside. As she leaves, the Wonderbolt pin briefly shines with a multicolored light the same way the spool of thread shined inTakes Manehattan.