Reshiram: A blue-eyed White Dragon who has power over fire.
Zekrom: A Red-eyed Black Dragon who has power over lightning.
Yu-Gi-Oh: Both of these beasties are notable cards, though their respective elements are switched.
In Pokemon and in Yu-Gi-Oh, the two end up fighting a lot.
Is this a cultural thing in Japan? Or a story of some kind?
(On a side note, Kyurem has yellow eyes, rounding out that red/blue/yellow thing again...)