Blue > Red > Yellow
Gold > Silver > Crystal
Emerald > Sapphire > Ruby
LeafGreen > FireRed
Platinum > Diamond > Pearl
HeartGold > SoulSilver
EDIT: At the request of dtewi.
Gold(Best) > Heart Gold > Platinum > Silver > Soul Silver > Diamond > Emerald > Sapphire > Blue > Leafgreen > Pearl > Red > Firered > Ruby > Yellow >>>>> Crystal(Worst)
That is all.
Oh wait.. for future reference
Opal > Topaz > Amythest
DouseSapphire > ScorchRuby
Obisidian > Quartz > Limestone
TimeDiamond > SpacePearl
Pixel Art can be fun.