I would think I'm not the only one who looks at the energy requirements for dragons and wonder where they come from. I myself have put quiet a good amount of thought into that. I have drawn some opinions about that and am eager to hear what others think. Be warned this is kind of long.
M. Charizard (X) EX: 2 fire, 1 dark and 2 colorless. Well we already know colorless is anything. But where does the dark come from? My theory is that it's an homage to this http://pokebeach.com/media/Charizard-star-d-EX-Dragon-Frontiers-100.jpg
Dratini/Dragonair/Dragonite(EX): They all work around lightning and grass. Though the flying version weaks and resists respectively, there is another idea I have (a recurring theme be aware now) My theory is that's an homage to http://pokebeach.com/media/Dragonite-d-EX-Delta-Species-3.jpg bar steel and http://pokebeach.com/media/Dragonite-ex-d-EX-Dragon-Frontiers-91.jpg. though originally it used water, electric and even fighting energy in E-series era. Of course my Delta Species theory doesn't hold true for all dragons as evidenced by...
Kingdra: They work around water and electric. Neither Delta Species Kingdra were electric, they were in fact fire/steel and fighting. The water seems obvious given its other typing but where does electric come from? Is this a reference to its water weakness maybe? Or something else?
Vibrava/Flygon (EX): They all work around grass and fighting. The latter may be obvious as a reference to its other game type. The former could be an homage to http://pokebeach.com/media/Flygon-d-EX-Holon-Phantoms-7.jpg again bar steel (a problem with most Delta Species Pokémon). Why this one and not http://pokebeach.com/media/Flygon-ex-d-EX-Dragon-Frontiers-92.jpg? There is the slight ripple that when Flygon was colorless it would tend to be lightning and grass.
Altaria: They work around water and steel. While I'm not sure where the steel comes from I believe the water is an homage to http://pokebeach.com/media/Altaria-ex-d-EX-Dragon-Frontiers-90.jpg although Delta Species Swablu was also water which might dampen this theory a little. It's also worth noting that when originally making it dragon Altaria used water and electric. As for what this means for the eventual Altaria EX and M. Altaria EX? My guess is the same unless they want to make it a fairy type instead.
Bagon/Shelgon/Salamence(EX): They all work on fire and water, and they have actually all worked on these two types from this Pokémon's introduction in EX Dragon. I'd like to say they are on homage to http://pokebeach.com/media/Salamence-d-EX-Delta-Species-14.jpg and http://pokebeach.com/media/Salamence-ex-d-EX-Dragon-Frontiers-98.jpg and perhaps the dragon ones are but when one takes into account this line has used fire and water since its inception, well I guess it becomes anyone's guess.
Latias(EX): This Pokémon uses fire and psychic. The latter maybe a reference to one of its types. The other I suspect is a homage to http://pokebeach.com/media/Latias-d-EX-Holon-Phantoms-11.jpg. Of course Latias was also electric/steel. Before being gold a couple of Latias used fire, psychic and water as well. I expect M. Latias EX will follow this trend, as also evidenced by...
Latios(EX)/M. Latios EX: This Pokémon uses water and psychic. Like Latias I think the latter is a type reference while the other could be a homage to http://pokebeach.com/media/Latios-d-EX-Holon-Phantoms-12.jpg. Latios use to use water, electric and psychic energy on a couple versions prior to being made gold.
Rayquaza(EX)/M. Rayquaza EX: This Pokémon uses fire and electric, with the exception of Rayquaza C Lv. X
which used water, psychic and fighting. Although I like to think a large part of that is homage to http://pokebeach.com/media/Rayquaza-d-EX-Holon-Phantoms-26.jpg and http://pokebeach.com/media/Rayquaza-ex-d-EX-Dragon-Frontiers-97.jpg. The fact other Rayquaza's used it before hurts this belief. It's also worth noting that delta species gave Rayquaza a water/steel one as well. Finally of note is this is the last dragon who can use the Delta Species idea.
Gible/Gabite/Garchomp(EX): They use water and fighting. I believe the latter is a reference to one of it's types. Is the former a reference to one of its game weaknesses ice? Or something else?
Dialga EX: This dragon uses psychic and steel. The latter is a reference to its other type. Is the former a reference to the fact in game it resists psychic and is immune to poison? Note there is no regular version yet though I bet it would follow this trend.
Palkia EX: This dragon uses water and grass. The former is again an alternate type reference. The grass on the other hand. I'm stumped here. Note there is no regular version yet though I bet it would follow this trend.
Giratina EX: This dragon uses psychic and grass. The former is again an alternate type reference. Like Palkia, I'm stumped on the other one. Note there is no regular version yet though I bet it would follow this trend.
Arceus: No dragon yet. I wonder which energies it would use. Dark and steel?
Axew/Fraxure/Haxorus: This dragon line uses steel and fighting. I have no idea why here. Thoughts?
Druddigon: This dragon uses water and fire. Again no idea why, thoughts?
Deino/Zweilous/Hydregion(EX: This line uses dark and psychic. I believe the former is a reference to its alternate type. The latter could be a reference to its immunity.
Reshiram/Zekrom: Both dragons use fire and electric. I think this could be a link to each other, being two thirds of a trio. Neither have dragon EX's yet.
Kyurem: This dragon uses water and psychic. The former I believe the former is an alternate type reference. As for the latter I have no idea. Thoughts? Kyurem has no dragon EX yet.
Black Kyurem(EX)/White Kyurem(EX): Both use water (one type) while black uses electric for Zekrom and white uses fire for Reshiram.
Dragalgae: This dragon use water and psychic. The latter I think is a reference to its alternate type. I think the former is a reference to its basic form Skrelp.
TyrantrumEX: This dragon uses fighting and steel. The former I think is an alternate type reference. Is the latter a weakness reference? Though w e don't have a Tyrunt or regular Tyrantrum yet but I bet it follows this pattern.
Goomy/Sliggoo/Goodra: This line uses water and fairy. Seems to me they're both references to this Pokémon's video game weakness. Or maybe water is a reference to how it needs to evolve to Goodra?
Noivern: First, there is no Noibat despite it being dragon too. This one uses dark and psychic. Not sure why, thoughts?
Zygarde: None yet. Fighting and grass maybe?
Again sorry for the long post. What are your thoughts about this, or am I the only one who puts this much thought into the reasons behind this?
M. Charizard (X) EX: 2 fire, 1 dark and 2 colorless. Well we already know colorless is anything. But where does the dark come from? My theory is that it's an homage to this http://pokebeach.com/media/Charizard-star-d-EX-Dragon-Frontiers-100.jpg
Dratini/Dragonair/Dragonite(EX): They all work around lightning and grass. Though the flying version weaks and resists respectively, there is another idea I have (a recurring theme be aware now) My theory is that's an homage to http://pokebeach.com/media/Dragonite-d-EX-Delta-Species-3.jpg bar steel and http://pokebeach.com/media/Dragonite-ex-d-EX-Dragon-Frontiers-91.jpg. though originally it used water, electric and even fighting energy in E-series era. Of course my Delta Species theory doesn't hold true for all dragons as evidenced by...
Kingdra: They work around water and electric. Neither Delta Species Kingdra were electric, they were in fact fire/steel and fighting. The water seems obvious given its other typing but where does electric come from? Is this a reference to its water weakness maybe? Or something else?
Vibrava/Flygon (EX): They all work around grass and fighting. The latter may be obvious as a reference to its other game type. The former could be an homage to http://pokebeach.com/media/Flygon-d-EX-Holon-Phantoms-7.jpg again bar steel (a problem with most Delta Species Pokémon). Why this one and not http://pokebeach.com/media/Flygon-ex-d-EX-Dragon-Frontiers-92.jpg? There is the slight ripple that when Flygon was colorless it would tend to be lightning and grass.
Altaria: They work around water and steel. While I'm not sure where the steel comes from I believe the water is an homage to http://pokebeach.com/media/Altaria-ex-d-EX-Dragon-Frontiers-90.jpg although Delta Species Swablu was also water which might dampen this theory a little. It's also worth noting that when originally making it dragon Altaria used water and electric. As for what this means for the eventual Altaria EX and M. Altaria EX? My guess is the same unless they want to make it a fairy type instead.
Bagon/Shelgon/Salamence(EX): They all work on fire and water, and they have actually all worked on these two types from this Pokémon's introduction in EX Dragon. I'd like to say they are on homage to http://pokebeach.com/media/Salamence-d-EX-Delta-Species-14.jpg and http://pokebeach.com/media/Salamence-ex-d-EX-Dragon-Frontiers-98.jpg and perhaps the dragon ones are but when one takes into account this line has used fire and water since its inception, well I guess it becomes anyone's guess.
Latias(EX): This Pokémon uses fire and psychic. The latter maybe a reference to one of its types. The other I suspect is a homage to http://pokebeach.com/media/Latias-d-EX-Holon-Phantoms-11.jpg. Of course Latias was also electric/steel. Before being gold a couple of Latias used fire, psychic and water as well. I expect M. Latias EX will follow this trend, as also evidenced by...
Latios(EX)/M. Latios EX: This Pokémon uses water and psychic. Like Latias I think the latter is a type reference while the other could be a homage to http://pokebeach.com/media/Latios-d-EX-Holon-Phantoms-12.jpg. Latios use to use water, electric and psychic energy on a couple versions prior to being made gold.
Rayquaza(EX)/M. Rayquaza EX: This Pokémon uses fire and electric, with the exception of Rayquaza C Lv. X
which used water, psychic and fighting. Although I like to think a large part of that is homage to http://pokebeach.com/media/Rayquaza-d-EX-Holon-Phantoms-26.jpg and http://pokebeach.com/media/Rayquaza-ex-d-EX-Dragon-Frontiers-97.jpg. The fact other Rayquaza's used it before hurts this belief. It's also worth noting that delta species gave Rayquaza a water/steel one as well. Finally of note is this is the last dragon who can use the Delta Species idea.
Gible/Gabite/Garchomp(EX): They use water and fighting. I believe the latter is a reference to one of it's types. Is the former a reference to one of its game weaknesses ice? Or something else?
Dialga EX: This dragon uses psychic and steel. The latter is a reference to its other type. Is the former a reference to the fact in game it resists psychic and is immune to poison? Note there is no regular version yet though I bet it would follow this trend.
Palkia EX: This dragon uses water and grass. The former is again an alternate type reference. The grass on the other hand. I'm stumped here. Note there is no regular version yet though I bet it would follow this trend.
Giratina EX: This dragon uses psychic and grass. The former is again an alternate type reference. Like Palkia, I'm stumped on the other one. Note there is no regular version yet though I bet it would follow this trend.
Arceus: No dragon yet. I wonder which energies it would use. Dark and steel?
Axew/Fraxure/Haxorus: This dragon line uses steel and fighting. I have no idea why here. Thoughts?
Druddigon: This dragon uses water and fire. Again no idea why, thoughts?
Deino/Zweilous/Hydregion(EX: This line uses dark and psychic. I believe the former is a reference to its alternate type. The latter could be a reference to its immunity.
Reshiram/Zekrom: Both dragons use fire and electric. I think this could be a link to each other, being two thirds of a trio. Neither have dragon EX's yet.
Kyurem: This dragon uses water and psychic. The former I believe the former is an alternate type reference. As for the latter I have no idea. Thoughts? Kyurem has no dragon EX yet.
Black Kyurem(EX)/White Kyurem(EX): Both use water (one type) while black uses electric for Zekrom and white uses fire for Reshiram.
Dragalgae: This dragon use water and psychic. The latter I think is a reference to its alternate type. I think the former is a reference to its basic form Skrelp.
TyrantrumEX: This dragon uses fighting and steel. The former I think is an alternate type reference. Is the latter a weakness reference? Though w e don't have a Tyrunt or regular Tyrantrum yet but I bet it follows this pattern.
Goomy/Sliggoo/Goodra: This line uses water and fairy. Seems to me they're both references to this Pokémon's video game weakness. Or maybe water is a reference to how it needs to evolve to Goodra?
Noivern: First, there is no Noibat despite it being dragon too. This one uses dark and psychic. Not sure why, thoughts?
Zygarde: None yet. Fighting and grass maybe?
Again sorry for the long post. What are your thoughts about this, or am I the only one who puts this much thought into the reasons behind this?