Raikou is based on the 雷獣
raijū, a thunder demon of Japanese lore. In regards to physical build, it is based on the
Smilodon fatalis, a well-known but extinct species of wildcat often referred to as a saber-toothed tiger. Its color and pattern scheme are reminiscent to that of a
Tiger. In the anime, Raikou is shown to be very agile, swift, stealthy, and a powerful attacker, just like a tiger. It has sharp claws in addition to it's long fangs, and its roar, which sounds like thunder, is so loud it can be heard miles away. The stripes that decorate Raikou's body also can be compared to zigzagging thunderbolts and perhaps even scars from claws. The white ruff around Raikou's face is akin to the
Siberian Tiger 's thick fur around its neck. The grey "plate" atop its head may be similar to Entei's head ornament, being either a helmet or crown that signifies courage and power. Raikou is particularly based on the Thunder and Lightning gods of most cultures surrounding the world. The flowing purple mane on its back is likely meant to invoke the image of a
cumulonimbus cloud, the cloud type most often associated with thunderstorms.