This is Flare Azul, Blazin' Blue's gender swapped version of himself.
Blazin' is asleep, with his girl Sapphire Scorch now sharing the same ベッド with him (she decided to live with him). After two hours of undisturbed sleep, a letter suddenly appears on the nightstand 次 to Blazin', and...
Blazin': A letter?? Who the 干し草, 乾草 sends me a letter at this hour? *sleepily reaches for the letter and falls out of bed*
Sapphire: Eh? Somebody there? *goes back to sleep*
Blazin': Says here-"Signed, Twilight Sparkle". *reads the letter* She wants me to be the one to try her gender swapping spell, which lasts 24 hours. Could be weird going around as a girl for a whole day, but I'll do it! Now, when do I meet her and where? Oh, at 12:00, at her house...
Later that same day.....
Sapphire: I heard about it. Aren't あなた worried?
Blazin': Not really. It could be fun!
After waiting for the right time, Blazin' arrives at Twilight's house, nervous but excited.
Blazin': Ding dong!
Twilight: The doorbell works fine, but nice sound effect. Glad あなた made it here! Come in!
Twilight leads the puzzled stallion through her house to her room.
Blazin': Won't someone see us? 虹 Dash または Fluttershy fly によって the window sometimes.
Twilight: Oh, yeah! Better close the curtains! Ok, ready to be genderswapped?
Blazin': Hit me with your best shot!
Twilight: Your'e the first ポニー to be excited about getting a spell tested on! Stand right there on the rug! I gotta read it to make sure I don't screw up! Uh huh, yeah, all right. Here goes!
Blazin': あなた sure this'll work? *ZAP!* YIKES!!
Twilight: *blinded によって the bright light* Did it work?
Blazin': (now Flare Azul, the mare version of himself) *in a higher pitched voice* It worked! I'm a girl-for the rest of the day!
Twilight: IT WORKED! I'm so good!
Flare Azul: What now?
Twilight: Go have fun, I guess.
Flare Azul (still Blazin' Blue) takes off to see what it's like being a girl. She looks at herself, and sees she is wearing ピンク glasses and shoes. She likes what she sees!
Flare: I didn't want to do this, but..*looks at flank* Sweet!
虹 Dash is walking around when she sees Flare. She stops and keeps looking at her.
Rainbow: Who the 干し草, 乾草 is she? I don't know, but she looks cool! I'll ask her to be my friend!
Flare sees 虹 approach her, and rolls her eyes.
Flare: Looks like I got some friendly attention...
Rainbow: Hi! I'm....
Flare: 虹 Dash. I know you.
Rainbow: What? How do あなた know me?
Flare: It's me, Blazin', または a genderswapped version. I had to make up a mare name.
Rainbow: Let me guess...Twilight? How long does it last?
Flare: All 日 today. I'm liking it so far. Care to go for a walk with me?
Rainbow: Sure, Flare, even though あなた are still my friend Blazin'!
Sapphire: Where the 干し草, 乾草 is Blazin'? He was supposed to go for a swim with me today!
Flare and 虹 meet with the other main four explaining what was going on. Twilight already knew the whole thing.
Rarity: So, uh...Want to pick out a bikini?
Flare: Sure. I promised Sapphire I would go for a swim with her today. She is gonna be quite surprised.
Flare chooses purple bikini with ピンク hearts on it.
AJ: Ah think you'll look cute in it, sugarcube!
Sapphire: *walking around the pool* BLAZIN'!! GET YOUR BLUE BEHIND H-*sees Flare right 次 to her* Whoa! Who are you?
Flare: Your genderswapped boyfriend, Blazin'!
Sapphire: No way. That's really cool! Ready to swim?
Flare: I haven't put on my bikini yet! *goes to put it on* Ready!
They both gallop and jump in together. They play "Marco Polo" and "Shark" to pass the time.
Spike: *passing by* Twilight wanted me to check on あなた to make sure your'e ok.
Flare: *steps out* I'm fine, Spike. I feel fantastic!
Spike: あなた look fantastic, too.
Rarity: *standing nearby* Spikey....
Spike: Sorry about that. The spell should wear off at nighttime. Later!
Flare and Sapphire head home, talking about the fun they had at the pool. After a shower, they watch TV until they fall asleep.
Flare: These shoes are a pain in the flank! Good thing it'll blow over によって tomorrow. My hooves are sore and red. *goes to sleep, but kisses Sapphire good night*
Sapphire: *blushes* I'm just gonna assume that is a sweet gesture. I don't want to sound または look awkward. *goes to sleep*
The genderswap spell that was put on Blazin' wears off, changing him from mare back into a stallion.
Rainbow Dash seems to want to make friends with the shy mare that she assumed suddenly showed up...Having no idea it was her friend Blazin' Blue genderswapped!