>>14384162Sinnoh's entire theme was antiquity and mythology.
The region has a massive archeological dig you can participate in.
The region has a library with books upon books dedicated to myths and lore.
The region has murals, statues, ruins, and temples abundant.
The region's champion is a researcher of ancient times and pokemon myths, who (at the above murals) will go on at length about them.
The region's name was chosen because it means mysterious by Junichi Masuda
The region has Arceus and the Creation trio located at Mt Coronet (Mt. Crown) at the center of the region.
The region's 3 main lakes house the lake trio which form a triangle with Mt Coronet at the center.
The region is bifurcated by said mountain.
To the west you have the Lunar Duo, and the subplot about nightmares and dreams.
To the east you have Heatran and the verdant Battle Zone.
Up north you have Regigigas and the temple people built in honor of him.
The plot of the region was heavily about the themes expressed above.
This is how you justify having a lot of legendaries. GF has yet to match the mythos and world building they pulled off in that game. Shit, even the movies from that time flowed and fed into each other.