Pokémon Legends: Arceus, giving players a chance to refamiliarize themselves with the Sinnoh region before diving into ancient Hisui. As a direct prequel to BDSP, Pokémon Legends: Arceus is full of Easter eggs and references to Sinnoh’s most famous cities and landmarks. Longtime fans of the Pokémon franchise will find plenty to be nostalgic about while exploring Legends: Arceus’ open map.

Since Pokémon Legends: Arceus takes place before people and Pokémon began living in harmony, the wilderness outside of Jubilife Village is mostly uninhabited, allowing wild Pokémon to roam freely. However, as the game progresses and Hisui’s residents begin to build bonds with the Pokémon of the region, players who are familiar with Pokémon BDSP will see the seeds of the future Sinnoh region being planted. Even the name “Sinnoh” is a reference to the ancient name the people of Hisui gave to Arceus, the God Pokémon.

Related: Pokémon Legends: Arceus' Ending Shouldn't Require A Complete Pokédex

While the Hisui and Sinnoh regions’ maps aren’t exactly identical, their layout and geography are extremely similar. The swampy areas of Pokémon Legends: Arceus' Crimson Mirelands are in the same location as the future Great Marsh of BDSP, and the snowy landscape of the Alabaster Icelands is every bit as frigid as Sinnoh’s Snowpoint City. As players explore more of ancient Hisui on their journey through Pokémon Legends: Arceus, the foundations of the future Sinnoh region can be seen in almost every area of the map.

Pokémon Legends: Arceus’ Jubilife Village Becomes Jubilife City

Pokemon Legends: Arceus' Jubilife Village vs BDSP's Jubilife City

Pokémon Legends: Arceus players begin their journey in Jubilife Village, which serves as the base of operations for the Galaxy Expedition Team. This bustling village shares a name with the future Jubilife City, one of the largest cities in Sinnoh as well as the Pokémon world as a whole. This future metropolis will someday be the home of BDSP's Jubilife TV Station, Trainer School, and Global Wonder Station, but ancient Hisui’s Jubilife Village has plenty of attractions of its own. Since trainers return to Jubilife Village after every excursion, they’ll quickly get familiar with the shops, Training Grounds, Pastures, and Galaxy Hall as they rest up and prepare for their next adventure into the wilds. Jubilife Village also has a few hidden references to Pokémon BDSP tucked away, including the Canala Bridge that references Canalave City and Floaro Main Street, which nods to the future Floaroma Town.

Pokémon BDSP’s Sandgem Town Is Built On Legends: Arceus' Sandgem Flats

Pokemon Legends: Arceus' Sandgem Flats vs BDSP's Sandgem Town

While Sandgem Town hasn’t been built yet in Pokémon Legends: Arceus, players can still visit the Sandgem Flats that will house this quaint town in the future. Just like the modern version of this area from Pokémon BDSP, the sands of the region’s southern shore stretch far into the Sandgem Flats, making “Sandgem” a very fitting name. Eventually, this area will host the laboratory of Professor Rowan, Commander Kamado’s ancestor, but it’s home to plenty of free-roaming Abra, Kadabra, and Mime Jr. in the ancient days of Hisui.

Legends: Arceus’ Floaro Gardens Tell Floaroma Town’s Legend

Pokemon Legends: Arceus' Floaro Gardens vs BDSP's Floaroma Town

Pokémon Legends: Arceus references plenty of Sinnoh’s Legendary Pokémon, and the story of Floaroma Town’s foundation is actually depicted in this BDSP prequel. According to Floaroma Town’s legend, the hill the town is founded on was once desolate, and no flowers would grow. However, once someone expressed their gratitude to nature on that hill, the flowers burst into bloom and have continued to bloom beautifully ever since.

Related: Pokémon BDSP Already Hints At Scarlet & Violet

In Legends: Arceus, the Floaro Gardens can be found in the Obsidian Fieldlands, but the flowers are withered and lifeless when players first visit the area. However, during Request 92, “A Token of Gratitude,” trainers witness Medi express her thanks to Shaymin in the Floaro Gardens, causing the field to bloom. It’s safe to say that this is the very same event that the legend of Floaroma Town references, giving players the chance to be a part of Sinnoh’s history itself.

Pokémon BDSP’s Eterna Forest Is The Modern Heartwood

Pokemon Legends: Arceus' Heartwood vs BDSP's Eterna Forest

While the Heartwood of Pokémon Legends: Arceus and BDSP’s Eterna Forest don’t share names, the connection between them is clear thanks to Pokémon Legends: Arceus’ soundtrack. The Eterna Forest of Pokémon BDSP has some of the most iconic music in the game, and fans of the franchise will likely recognize this nostalgic tune as they explore the Heartwood in the Obsidian Fieldlands. The Pokémon that can be encountered in these areas are similar as well, and while it seems some Pokémon have come and gone between the time of Hisui and modern Sinnoh. However, trainers can still catch Pokémon like Wurmple, Cascoon, Silcoon, Beautifly, Dustox, and Buneary in both of these serene forests.

Legends: Arceus’ Oreburrow Tunnel Becomes Oreburgh Mine

Pokemon Legends: Arceus' Oreburrow Tunnel vs BDSP's Oreburgh Mine

Located on the east side of the Obsidian Fieldlands nearest Mt. Coronet, Pokémon Legends: Arceus’ Oreburrow Tunnel will eventually become the Oreburgh Mine that fuels Pokémon BDSP’s Oreburgh City. Led by Gym Leader Roark, the mine is not only the city’s main energy source, but it also serves as a Pokémon training ground for its residents. Like the Shaymin quest of Floaro Gardens, Legends: Arceus gives players a glimpse of the Sinnoh region’s history in the Oreburrow Tunnel. In the Legends: Arceus Daybreak update, trainers are called to calm an Alpha Onix raging in the Oreburrow Tunnel as part of Request 103, “Digging for Tomorrow.” After calming the Pokémon down, Kochika teams up with the Onix to dig for coal in the tunnel, hinting at the foundation of the future Oreburgh Mine.

Solaceon Ruins Appear In Pokémon Legends: Arceus & BDSP

Pokemon Legends: Arceus' Solaceon Ruins vs BDSP's Solaceon Ruins

Even ancient Hisui has its fair share of ruins, and the Solaceon Ruins in Pokémon Legends: Arceus are the same ruins that appear near Pokémon BDSP’s Solaceon Town. While the labyrinthine layout of BDSP’s Solaceon Ruins differs from the one-room ruins of Legends: Arceus, the two locations are undoubtedly the same. Not only do they share a similar location on the map, but they’re the only location in BDSP and Legends: Arceus where wild Unown appear.

Related: Why Pokémon Legends: Arceus' Dialga & Palkia Forms Look So Weird

The message inscribed in the ruins is the same as well: “All lives touch other lives to create something anew and alive.” In both games, the Solaceon Ruins stand as a testament to friendship and connection, though their origins and the strange Unown remain a mystery.

Legends: Arceus & BDSP Feature Three Legendary Lakes

Pokemon Legends: Arceus' Lake Verity vs BDSP's Lake Verity.

The Legendary Lake Guardians of Legends: Arceus and Pokémon BDSP reside in the region’s three major lakes: Lake Verity, Lake Valor, and Lake Acuity. Unsurprisingly, these massive bodies of water don’t change much between the ancient days of Hisui and modern Sinnoh, and trainers will have to visit all three of these legendary lakes to catch Mesprit, Azelf, and Uxie. Trainers can enter the lakes’ underground caverns through an island in the middle of each lake, and even the layouts of these caves are identical in both games. Based on Volo and Cogita’s knowledge, it seems that these lakes are steeped in ancient myths and legends even in the days of the Hisui region.

Pokémon BDSP’s Veilstone City Is Named After Veilstone Cape

Pokemon Legends: Arceus' Veilstone Cape vs BDSP's Veilstone City

Veilstone Cape is a rocky cliff that juts out into the Cobalt Coastlands of Pokémon Legends: Arceus, so it’s no surprise that its namesake Veilstone City is located nearby in Pokémon BDSP. Veilstone City isn’t a coastal city, but it still shares its clifftop geography with Veilstone Cape. In the future, the cliffs and mountains of the area will be the home of the famous Veilstone Department Store and Veilstone Gym, but in ancient Hisui, players will only find wild Pokémon like Hisuian Growlithe, Glameow, and Mothim roaming the cape.

Pokémon Legends: Arceus Lets Players Visit BDSP’s Seaside Hollow

Pokemon BDSP's Canalave Library tells the Sea's Legend from Pokemon Legends: Arceus

While the Seaside Hollow of Pokémon Legends: Arceus doesn’t appear as a location in BDSP, it’s referenced in a book in the Canalave Library. The book details “The Sea’s Legend,” which tells the story of a brave human who traveled with three special Pokémon to meet the Legendary Manaphy, Prince of the Sea. By copying the legend found in this book as part of Request 66, Legends: Arceus players can encounter Manaphy and Phione in the Seaside Hollow, just like the ancient hero of The Sea’s Legend.

Related: When Pokémon BDSP May (Finally) Get Wonder Trading

Surprisingly, Manaphy and Phione are two of the few Pokémon in the Hisui region that trainers don’t actually have to catch before encountering Arceus. However, trainers who want to fully complete their Hisui Pokédex will have to study up in BDSP’s Canalave Library to figure out the secret of encountering this Legendary pair.

Legends: Arceus’ Firespit Island Is Stark Mountain’s Volcanic Origin

Pokemon Legends: Arceus' Firespit Island vs BDSP's Stark Mountain

Firespit Island is a volcanic island in the oceans of the Cobalt Coastlands in Pokémon Legends: Arceus, and while it may not seem to have a direct connection to Pokémon BDSP, it’s likely that the future Stark Mountain was formed from Firespit Island’s eruptions. While the island’s volcanic activity seems to have slowed by the time BDSP takes place, trainers will still have their resolve tested in this lava-filled mountain as they battle the Ace Trainers and Dragon Tamers inside. Not only do the two share their geographical location, but the Legendary Pokémon Heatran can be encountered in this area in both games.