The Origin
I've encountered suicune, one of the legendary "dogs" as an actual human.
The Human Species Ch. 25 - Unique Revolutionist Zoroark
Sensing the aura of the aged monster in front of him, he felt a power beyond that of suicune, raikou and rayquaza all put together...
Forever Legendary Ch.3 - The Legendary Ho-Oh
The burned tower is housed by wild pokémon, and is said to once have been the habitat for entei, suicune and raikou.