Concerning Ho-Oh's relation with the three legendary beasts, I've often heard a different story. It was said that long ago, the tower was struck by lightning and subsequently caught on fire. When rain eventually put the fire out, most of the tower had been destroyed, and three Pokémon had died. Ho-Oh resurrected the three in a way related to the building's destruction: Raikou representing the lightning that struck the tower, Entei representing the fire that engulfed the tower, and Suicune representing the rain that finally extinguished the tower.
Concerning Ho-Oh's relation with the three legendary beasts, I've often heard a different story. It was said that long ago, the tower was struck by lightning and subsequently caught on fire. When rain eventually put the fire out, most of the tower had been destroyed, and three Pokémon had died. Ho-Oh resurrected the three in a way related to the building's destruction: Raikou representing the lightning that struck the tower, Entei representing the fire that engulfed the tower, and Suicune representing the rain that finally extinguished the tower.