Pokemon Brilliant Diamond and Shining Pearl are out in the wild, with fans diving back into Sinnoh. Of course, in a few months, players will be venturing into Hisui in Pokemon Legends: Arceus— with Hisui being the ancient name for Sinnoh when it was discovered and settled by humans. This makes these games very closer already, but now a new teaser for Pokemon Legends: Arceus has seemingly been discovered in BDSP.

Fans know very little about Pokemon Legends: Arceus, but several of its additions have been shown off, particularly of its Hisuian variants. These are likely older forms that slowly became irrelevant in terms of evolution. Thus far, this has included fan-favorite Pokemon like Zorua/Zoroark and Growlithe, but Pokemon Brilliant Diamond and Shining Pearl may include teases of another.

RELATED: Pokemon Shining Pearl Player Gets Wrong Legendary

First pointed out by Joe Merrick, the webmaster of beloved Pokemon site Serebii, there is a new book in the Canalave library that was not present in the original Pokemon Diamond, Pearl, or Platinum. It tells a story about the prince of the sea, the East Sea, and more, while naming Mantyke, Buizel, and a “Qwilfish with huge spikes” there.

There are two notable things about this story. First, it shares a lot of similarities with the Pokemon Ranger and the Temple of the Sea movie, but there are a few distinctions. There is no East Sea in the movie’s description, and while a Mantyke and Buizel appear on some posters/movie art, there is no “Qwilfish with huge spikes” in the movie/art.

Secondly, this lines up with Pokemon Legends: Arceus rumors that Qwilfish would be receiving a Hisuian variant. This is by no means any confirmation of the rumor, but it is, as Merrick suggests, “very suspicious.” It could have been a straight-up Easter egg to Pokemon Ranger and the Temple of the Sea, but the changes are quite noteworthy. They also had to be intentional.

When and if Nintendo/Game Freak confirm Qwilfish’s Hisuian Variant, it’ll be interesting to see what its huge spikes look like. Not to mention, Pokemon Brilliant Diamond and Shining Pearl are still basically brand new, and there may be more additions/changes like this to be discovered in Sinnoh. Ultimately, it’ll be interesting to see how far the connection between Brilliant Diamond, Shining Pearl, and Legends: Arceus go. It may stop at just teasers and Easter eggs, but this shows that potential.

Pokemon Brilliant Diamond and Shining Pearl are out now for Switch.

MORE: Pokemon Legends: Arceus - Every Early Purchase Bonus