Splatfest

"Pick a side and battle it out in these special Turf War events. Find out about the latest Splatfests in Inkopolis Plaza, and be sure to pledge allegiance to your favorite side in the week leading up! Then help your side win by competing in Turf War battles!"

- Splatoon's official website

Splatfest, known as Festival or Fes in Japan, is a special event that takes place in Splatoon, during which Inklings choose between two teams, such as Cats or Dogs, and compete in the Turf War mode for Super Sea Snails.

Description
Splatfest is a recurring event hosted by the Squid Sisters, Callie and Marie. During this event, Inklings are able to choose between two teams and participate in battles against each other. Inklings are limited to two colors during the Splatfest, reflecting which side they're on. The clothing section of the equip screen also becomes locked and all players are forced to wear the Splatfest Tee, which changes in color and design based on an Inkling's chosen team. Inkopolis Plaza and all the stages are decorated with a flood of Miiverse posts from the Splatfest/Festival tag on the Splatoon community, some of which take the form of neon signs, banners and even fireworks. Darkness also descends over Inkopolis and all Turf War stages. Fireworks go off periodically in the plaza, and specks of light resembling fireflies or fire embers can be seen rising into the sky.

Each Splatfest lasts 24 hours, during which time the region involved will be isolated and Splatfest players will only face off against players of their own region. Meanwhile all other regions will continue to play amongst each other. Super Sea Snails are awarded to participating players upon Splatfest's conclusion.

Preparation
Before a Splatfest begins, Inkopolis Plaza experiences a variety of visual upgrades to prepare for the event. One week before a Splatfest, a voting booth appears next to the Miiverse Mailbox and the event's theme is announced. Inklings also receive a themed Splatfest Tee, a piece of gear that is wearable for a limited amount of time. Two days before a Splatfest, neon signs adorned with up-and-down-pointing arrows appear on walls and buildings. The day before it takes place, the Plaza becomes noticeably more crowded and two large trucks supporting stage scaffolding appear in the area's center.

Reward Tiers
Super Sea Snails are awarded to participants based on the size of their team, matches won, and ground covered, which dictate each player's Splatfest Title.

Splatfest EXP is earned by participating in and winning matches. Winning a match earns you 3 EXP, and your participation bonus is based on how much BP worth of ground you covered in ink during the match. If you cover 200–399 BP worth of ground, you earn 1 bonus participation EXP; if you cover 400+ BP worth of ground, you earn 2 bonus participation EXP. One can earn a maximum of 5 EXP per match if your team wins and you cover at least 400 BP worth of ground during the match.

Once Splatfest concludes, the results are announced during a broadcast. The results are based on team popularity, the percentage of the vote each team received, and wins, the percentage of matches each team won. Win percentage is worth four times more than the value of popularity. Players are awarded Super Sea Snails based on the Splatfest Title they have earned. Players on the winning team will earn more Super Sea Snails that those on the losing team.

Victory
The final score is calculated based both on popularity and on wins. The formula is as follows:

When the Squid Sisters announce the results, the highest of the popularity and win percentages are both individually highlighted before the final results are shown.

The formula used to use, but this was changed in version 2.0.0 in the August Update.

List of Splatfests
The following is a list of all Splatfest events and their start times. On each event in the tables, the first choice is always sided by Callie while the second is sided by Marie.

Completed

 * North America

Miiverse
Before and for the entire period of Splatfest players can post messages of support for their side to a special channel on Miiverse that will be displayed throughout Splatfest. This is done through a special option that shows up during Splatfest.

Delays
While the first Splatfest event, in Japan, went by flawlessly, the first North American Splatfest was delayed. The reason given was because of matchmaking issues with Japanese players. . The original schedule for the event was from June 20th (Sat) at 6 AM PDT to June 21st (Sun) at 6 AM PDT, and some days later, it was revealed that it would be moved to July 4th (Sat) at midnight PT.

The first European Splatfest event, that was meant to start on the 27th of June at midnight CEST, was equally postponed, so that it would take place on the same day as the North American one.

Quotes
"Sometimes the citizens of Inkopolis just wanna party, you know? To satisfy this urge, they throw an event called a Splatfest. To take part in a Splatfest, head to the Pledge Box and pick a team. This is the spot. Don't forget!"

- Info Box

Squid Sisters after Splatfest
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Cat versus Dog Results
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Roller Coaster versus Water Slide Announcement
"Callie: Do you prefer to coast through life? Marie: Or are you the type to let it slide? Callie: In this corner, the thrill seeker's ride of choice... ROLLER COASTERS! Marie: And in the other, the wet-and-wild splash dash... WATER SLIDES! Marie: So, Callie, how do you get your kicks? Callie: Roller Coasters! The faster and loopier, the better! Marie: Urp... Just thinking about them makes me sick... Callie: Whoa there, Marie. Take a deep breath. Callie: So I guess you're more into water slides? Marie: Of course! What self-respecting Inkling isn't?"

- Squid Sisters announcing Roller Coaster versus Water Slide

"Callie: YEEEEEAH! Coast to coast, baby! Marie: Urp... Callie: The coasters with the mosters! Marie: That's not a real word."

- Squid Sisters announcing the results of Roller Coaster versus Water Slide

Marshmallow versus Hot Dog Announcement
"Callie: It's time to get fired up! Marie: HAHAHAWT! Callie: They're the fluffiest smorsels you'll ever eat... MARSHMALLOWS! Marie: Versus the reason that campfires even exist... HOT DOGS! Marie: So, Callie, which would you rather roast? Callie: Marshmallows!  I just loooooove smores! Marie: Yes, you definitely have a sweet tooth. Callie: I know, right?!  My teeth are DELICIOUS!  Yummmm... Callie: How about you, Marie?  I'm guessing hot dogs? Marie: They're the perfect food!  Just a cylinder of meat!"

- Squid Sisters announcing Marshmallow versus Hot Dog

"Callie: Team Marshmallow wins! Marie: Doggone it! Callie: We did it! Good job, my marshmallow peeps! Marie: Well played, you sweet-toothed tryhards!"

- Squid Sisters announcing the results of Marshmallow versus Hot Dog

Autobot versus Decepticon Announcement
"Callie: Trannnsformerrrs! Marie: More than meets the eye! Callie: On one side, the legendary heroes of Cybertron... AUTOBOTS! Marie: And on the other, the baddest evil robots ever... DECEPTICONS! Marie: So, Callie, which side are you on? Callie: Autobots all the way. Optimus Prime for life! Marie: I shoulda figured... You're a classic goody-goody. Callie: Whatever. You're just jelly of our sweet red shirts! Callie: Seriously, Marie. What's so cool about Decepticons? Marie: Um...hello? Shockwave? Soundwave? Megatronus?!"

- Squid Sisters announcing Autobot versus Decepticon

"Marie: Decepticons, annihilate! Callie: Man... Marie: Being evil never felt so good! Callie: Yeah, yeah. Our shirts were way cooler though!"

- Squid Sisters announcing the results of Autobot versus Decepticon

Rock versus Pop Announcement
"Callie: Time for a battle of the genres! A musical melee! Marie: Woo! Callie: On one side, distortion, drum fills and guitar solos! ROCK! Marie: And on the other, catchy hooks, fashion and fun! POP! Callie: What a contest! Rock goddess or pop princess? Marie: Since we're actually pop stars, I gotta go with pop! Callie: Pop's great and all, but I'm gonna go with rock here! Callie: Can't beat turning up the volume and rocking out! Marie: Maybe you should go join the Squid Squad then! Callie: Haha! Noooo way! Squid Sisters forever!"

- Squid Sisters announcing Rock versus Pop

"Callie: ROCK ON! Marie: Ugh... I don't believe it... Callie: Great work, rock 'n' rollers! Marie: Hey, we pop fans did well too!"

- Squid Sisters announcing the results of Rock versus Pop

Eating versus Sleeping Announcement
"Callie: We have to know: which is your idea of heaven? Marie: Yeah! Callie: On one side...it's chips, cheese and chocolate! Marie: Not all together, I hope... Callie: EATING! Marie: And over here it's blissful blankets and puffy pillows! SLEEPING! Callie: So which are you? Total foodie or sleeping beauty? Marie: I love the feeling of going to bed after a hard day! Marie: I'm picking sleeping for sure! Callie: As long as you don't fall asleep during a battle... Callie: Me, I've gotta go for eating all the way! Callie: I'd wrestle a shark for those Arowana Mall chips! Marie: It's true... I'd hate to be that shark!"

- Squid Sisters announcing Eating versus Sleeping

"Callie: EAT THAT! Marie: Somebody tell me this is a bad dream... Callie: We sure chewed through the competition! Marie: Hey...we did well too... I'm so tired, though..."

- Squid Sisters announcing the results of Eating versus Sleeping

North Pole versus South Pole Announcement
"Callie: It's a snowy skirmish! An ice cap quarrel! Marie: Brrr! Callie: On one side, we're going Arctic! THE NORTH POLE! Marie: And on the other, we're going way way down to... THE SOUTH POLE! Callie: So pack your scarf and gloves! Where'll it be? Marie: Are you kidding? Only one of those has penguins! South Pole all the way! Callie: Whaat?! Don't you want to go visit Father Squidmas? Callie: I'm voting for the North Pole! Marie: You know Father Squidmas is just Gramps, right? Callie: Hmph, you can believe what you want. Callie: It's your fault if you get a lump of coral for Squidmas!"

- Squid Sisters announcing North Pole versus South Pole

"Marie: Yaaay! Penguins take it home! Callie: I'm sorry I failed you, Father Squidmas... Marie: Well done to everyone who picked the South Pole! Callie: Hey, the North Pole peeps did really well too!"

- Squid Sisters announcing the results of North Pole versus South Pole

Singing versus Dancing Announcement
"Callie: It's all about becoming one with the music! Marie: Woo! Callie: On one side, get ready to belt those high notes! SINGING! Marie: And on the other, it's time to strut your stuff! DANCING! Callie: Finally, a topic we can agree on! Right? Marie: Well...I've loved singing since I was a little squid... Marie: But... dancing is such a great stress reliever. I gotta pick dancing! Callie: Great Zapfish! You can't be serious! Callie: For me, singing is my one true passion in life! Callie: I thought it was yours as well... Marie: Don't get me wrong! I love singing too!"

- Squid Sisters announcing Singing versus Dancing

"Callie: Singiiiiiiiiiiiiing! ♪ Marie: I'm gonna have to go and dance my stress away... Callie: Well done to all the singing superstars! Marie: Good effort, though, dance fans!"

- Squid Sisters announcing the results of Singing versus Dancing

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Trivia

 * During a Splatfest, Regular & Ranked Battles take a brief hiatus and are not available.
 * Some randomly selected players are able to join as early as 5 minutes before the official start time for faster matchmaking.
 * In a Splatfest, if one team joins a server for long enough and the other team doesn't connect, members of the same team will join and battle with regular colors. Splatfest EXP can be earned in these matches, but they do not affect the total win percentage for either team.
 * About midway through the Roller Coasters vs. Water Slides Splatfest in North America, the colors became randomized for a few rounds instead of the standard purple vs. green before returning to normal. It is unknown why this happened.
 * In Inkopolis Plaza, while Callie and Marie are performing, their dresses and hats and Callie's highlights at the end of her hair are also the same color as the team they represent.
 * When Judd dances on his box, the pillow he sleeps on disappears. It reappears after the Splatfest when Judd goes back to sleep.
 * When not near him, Cap'n Cuttlefish will pop out of the entrance to Octo Valley and start bobbing his head to the music.
 * The end pose of the dance Callie and Marie do during a Splatfest represents the two teams fighting each other.
 * As of August 30, 2015, Arowana Mall is the only stage to not be featured in a Splatfest for the NA and JP regions.
 * As of August 30, 2015, the NA Splatfest results have never had a team win both popularity and wins in the same Splatfest.