Legendary Acrostic

Lugia, Guardian of the sea
Entei, the swift Pokemon of Fire
Great legends tell of these and many other
Extraordinary Pokemon that
None have ever captured
Do they serve as gods to warn us
Against the perils of tampering with nature?
Raikou, Pokemon of Thunder
Your legend and that of your fellows shall last forever

Perhaps they are the creators of the world
Or even the elements made real
Keepers of ancient secrets
Enigmas few can solve
Many have sought them but
Only those chosen will see them for to
No others will they appear