Raikou Gijinka concept

Raikou the harbinger, a majestic and proud, strong type. Very energetic, but fierce and easy to anger. He is sympathetic and cares deeply for the wellbeing of pokemon, but at the same time, he is the enforcer of law for Ho-oh. He uses an electrified spiked ball and chain that is similar to the beasts tail called the Flash Hammer, and has the shroud of clouds.

His true name is Ferrous, originally a Jolteon. The 3 guardians of Ho-oh were originally Jolteon, Flareon and Vaporeon, but as they died in the great fire, Ho-oh restored them to life as greater beings in return for having served her dutifully.