From right to left is how the generations go. And Lord Black is said to be the spawn of one of Original Red's epic sperm. This artwork is really awesome!
Games, from right to left: Red/Blue/Yellow, Gold/Silver/Crystal, Ruby/Sapphire/Emerald, FireRed/LeafGreen, Diamond/Pearl/Platinum, HeartGold/SoulSilver, Black/White. So yes, two Golds just like there's two Reds.