Mt. Coronet (Japanese: テンガン山Mt. Tengan) is the highest mountain in the Sinnoh region, part of a long mountain range that divides the region in half. Most of it is a deep cave, though there are several above-ground areas in which it snows constantly.
Mt. Coronet stands in the middle of Sinnoh, extending from the northern wilderness to the southern tip of the region, splitting it into two halves. It is truly best defined as a mountain range, with the highest peak shrouded in legend, perhaps being the highest mountain in the entire Pokémon world. The Spear Pillar is situated at the highest point, an ancient shrine to Pokémon now only in ruins, with several of its pillars still standing, all pointing skyward. The legend of the creation trio is deeply connected to the mountain, as is the plot of Team Galactic. A stained glass window in the Foreign Building in Hearthome City depicts the mountain with a bright shine, representing the Spear Pillar and possibly depicting the creation of Dialga, Palkia, and Giratina. Its place in Sinnoh has caused variation in the species of Shellos and Gastrodon, which have different coloration depending on the side of Sinnoh they are native to.
Mt. Coronet's southern cavern, which leads between Route 207 and Route 208, features several elevated rock formations as well as several pools of water. It is here where the player will first meet Cyrus in Pokémon Diamond and Pearl, and meet him for a second time in Pokémon Platinum. Though it is a simple cavern, requiring no HMs to pass through, it features the only way to the Spear Pillar, only accessible with Rock Climb and Surf.
The northern cavern is vastly different from the southern one, with no pools of water on the ground floor, and requiring Rock Smash and Strength to navigate between the two halves of Route 211 and toward Route 216. At its northern section, this cavern leads further below the surface, into an area blanketed in a dense fog where a large underground lake is located. This lake is the only place that Feebas is available in Sinnoh, though like in Hoenn, it is found only in specific tiles on any given day (see Finding Feebas). At the north end of this area is a way back up to Mt. Coronet's northernmost cave, leading out toward Route 216, and in Platinum, where the Iceberg Ruins is located.
The upper caverns are increasingly complex areas, though eventually the player will make his or her way outside of the mountain, into its snowy peaks. This outer area features constant hail, much like Routes 216 and 217, as well as many hardy Pokémon adapted to living in this harsh environment. A cave painting of the lake guardians, similar to the one in Celestic Town, blocks the way to the upper caverns until Team Galactic is defeated in Team Galactic HQ, which is in Veilstone City.
The Spear Pillar is located on the highest peak of Mt. Coronet, the highest point in Sinnoh. It is home to ruins that have been worn down over time, stated by legend to be the place where Dialga, Palkia, and Giratina were created by Arceus. It is here that Cyrus summons both Dialga and Palkia with the Red Chain, though when their proximity to each other causes an imbalance in the structure of reality, Giratina arrives to whisk Cyrus away to prevent further damage.
If an Azure Flute is obtained from a special Nintendo event, a staircase can be opened on the Spear Pillar to the Hall of Origin where Arceus waits. The battle begins as soon as the player steps onto the platform at the end of the staircase.
In Platinum, the Iceberg Ruins appear near Mt. Coronet's exit onto Route 216. If the event Regigigas is not with the player, a NeverMeltIce will be found in its cavern instead.
Feebas are elusive in Mt. Coronet, similar to Route 119 in Hoenn. Instead of being found in any fishing location as would be customary with most Pokémon, Feebas are located in only four random water tiles in B1F (the foggy floor with the lake leading to Route 216). Of the total 528 fishable tiles, one Feebas tile is located within each 132 tiles (counted left-to-right then top-to-bottom). Adding to the difficulty, other Pokémon besides Feebas will still appear in the Feebas tiles as well. There is no known easy method to determine which tiles contain Feebas: the only way is to fish repeatedly in each and every water tile in B1F, doing so enough times to be reasonably confident that no Feebas are in that tile (or else risk missing a Feebas tile). (If the player reels in one Pokémon in every tile, there is a 1 in 16 (approximately 6%) chance they will pass over all four Feebas tiles without reeling in a single Feebas.) Any Rod can find Feebas. Once hooked, Feebas is fairly easy to catch, with a catch rate of 255, and they can be fished from the same tile many times. The locations of the four tiles change every day.
Despite needing to be ventured through to arrive in Hearthome City in the games, Ash and his friends were not shown taking this route through the mountain's caves. In Nosing 'Round The Mountain! however, Alan asks Ash for a battle near the mountain, so that his Nosepass will evolve. In many other episodes, the mountain can be seen in the background scenery.
In the Pokémon Adventures manga, Mt. Coronet is the destination to which all heirs and heiresses of the Berlitz family head to excavate the materials for the family emblem. Being the only daughter, Platinum was assigned two bodyguards to ensure her safety when she decided the time was right to embark on her journey. After a mix-up where Diamond and Pearl were mistaken for her bodyguards and helped her overcome the trials of their journey (thinking that it was a reality TV show with Platinum as the guide), the trio first reaches this destination in Passing by Probopass and Maneuvering around Magnezone, but only the west side available through Eterna City. Once there, they unwittingly come across Cyrus, who was initiating the evolutions of his Nosepass and Magneton, and afterwards, determining that they were defiling the "sacred" site, buries Pearl and Platinum in a Rock Slide.
It is also in Mt. Coronet that the final battle of the Diamond & Pearl chapter takes place much later, as with the games.
Related cards Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Mt. Coronet is named after a coronet, a small crown consisting of ornaments fixed on a metal ring, as the mountain itself is the "crown" of Sinnoh. The Japanese word 天冠 tengan literally means "celestial crown", considering the mountain's connection to Arceus.