The arena consists...of a gigantic single layer cake. Yes, a simple yet elegant baker's masterpiece, with its dark brown color indicating a chocolate flavor, and topped with fluffy white and red frosting. It almost seems like a crime to fight on it instead of eat...but such is the way of NetBattles.
30% Decorative Frosting
Frosting - Delicious, whipped frosting. Aside from being yummy to any Navi with a sweet tooth (or any tooth), it can prove to be the undoing of many a seasoned warrior, despite only going up to the midway of a standard height Navi's boot. Due to its creaminess, it makes much the 'floor' quite slippery, causing Navis to slide around if they're not careful. However, it can also be picked up and thrown with certain weapons. It's too soft to do any damage (even if you stuffed in a cannon and shot someone point blank, it couldn't hurt them), but it can make the area more balance friendly, and a well aimed throw with it could inflict Blind status for a turn or so. Not to mention making the one getting hit really, really embarrassed by getting hit by frosting.
Decorative Frosting - More of the scrumptious frosting, this time in a red color. The big difference between it and regular Frosting is that it's denser and rises much higher, clear to a stand Navi's chest. This makes it harder to maneuver around, of course, and in a worst case scenario, a Navi could be completely stuck for a moment or two. Of course, if you can master this terrain, it's a potentially effective place to hide, bringing an interesting risk/reward to play. Interestingly, if the cake is viewed from a bird's eye view, the decorative frosting appears to say 'Happy Birthday!' in big, bold letters. But whose birthday is it? ...Luckily, it's someone's birthday every day, so the creators of the cake need not think of an actual explanation.
Candle (200 HP each, 10 total candles) - Pink and white swirl around the candles as they rise clear above the heads of Navis, culminating in a bright orange flame around 7 feet up. The candles themselves are surprisingly difficult to destroy, making them prime places to hide and catch one's breath despite only being about twice as wide as a standard Navi. They also serve as a potential peril to those that grow weary of being hindered by the Frosting, as those that aren't careful while flying are sure to feel the wrath of the 'fire' in the form of 20 damage each time they run into it, and even grounded Navis must make sure to keep their hands a safe distance from them. Wind-based attacks can put them out for a turn. Bizarrely, the candles' flames aren't actually fire, and are simply illusions; the true damage comes from the razor sharp blades that make up each candle's wick, and lose their sharpness when hit by wind. Maybe they're actually fluorescent candles? The wonders of candle technology...
Plate - It's a big cake, but that doesn't mean it's the only thing around. The arena sits on an even more gigantic plate, which happens to be white and decorated with lovely blue tulips around the edge. It mainly serves as a barrier against those falling off the cake, be it by an opponent design, their own design, or some other design. It can be fought on as though it were regular panels, without the usual distractions of the arena. Of course, there isn't a ton of room to move horizontally between the edge of the cake and the edge of the plate, and moving to the bottom takes one action, as well, so try and be sure it's the right decision before consciously dropping down.
Cake - Even though the entire arena focuses on it, by default the cake itself has no role at all aside from providing the floor beneath the Frosting. However, if said Frosting is moved somehow, the top of cake becomes visible. This makes that part of the cake act like a regular panel, being able to be traversed without incident. Of course, you could also eat the cake if you choose...but aside from being delicious, doing so has no benefit to the Navi. At least it'd prove that the cake is no falsehood.
Cover - A cheap plastic cover, with small cracks here and there...so naturally, it's indestructible. It provides a cylindrical seal around the cake, from the edge of the plate to around 10 feet above the top of the candle flames. Thanks to this, all Navis are confined to the cake and its surrounding areas, without fear of being knocked a mile away A small knob at the top-center provides a means to remove the cover from the outside...but is there anyone outside the cover? Could it be possible that an entire existence exists beyond the realm of the cake? Or is it simply a covered cake on a table? The world may never know...
Once the information is relayed to the Operators, they are given a few moments to strategize with their Navis before the match begins...