Keldeo is a dual-type Water/Fighting Mythical Pokémon introduced in Generation V. While it is not known to evolve into or from any Pokémon, Keldeo has a second form from Pokémon Black 2 and White 2 onward, which requires it to know the move Secret Sword. Its original form, Ordinary Form, will then become Resolute Form. Prior to Generation VIII, Keldeo will change into Resolute Form if it learns Secret Sword, and will permanently remain in that form as long as it knows the move; in Generation VIII, Keldeo will only temporarily change into Resolute Form if it enters a battle knowing Secret Sword.

Keldeo was leaked on a photo of a page from CoroCoro magazine on February 13, 2012, and it was officially revealed on February 15, 2012. Its Resolute Form was officially revealed June 13, 2012. Along with Cobalion, Terrakion, and Virizion, Keldeo is a member of the Swords of Justice. Take a look below for 28 awesome and fun facts about Keldeo.

1. Keldeo is a quadruped, colt like Pokemon with a cream colored body.

2. It has a short, rounded snout with large nostrils, and blue eyes.

3. It has a large, feathery red mane, long, dark blue, ridged eyebrow-like protrusions, and a single cream-colored horn that curves slightly.

4. The back of its head, as well as its neck, is covered with fluffy, light blue fur.

5. Keldeo has blue hooves, which are capable of ejecting water.

6. Its tail is light blue with white spots and resembles an elaborate feather in a cap.

7. Upon learning Secret Sword, Keldeo transforms into its Resolute Form.

8. The dark blue protrusions become shorter and lighter in color, resembling ears.

9. Its horn becomes dark blue, and grows larger and ridged.

10. On the side of its head are three feathers colored aqua blue, green and orange.

11. Keldeo was trained by the other members of the Swords of Justice.

12. Keldeo tends to cross the world, and often appears at beautiful watersides.

13. Keldeo also travels in order to further improve itself through training.

14. It can walk across water by ejecting water from its hooves.

15. It is said Keldeo must endure harsh battles in order for the forehead horn to develop, which then its true power will be awakened.

16. It is thought that when Keldeo becomes resolute, its body fills with power and it becomes swifter.

17. The horn on its forehead is filled with the hidden power.

18. The horn can change into a sword which can cut through anything.

19. Long ago, a fire started in the Moor of Icirrus because of a war among people. In this fire, Keldeo was separated from its parents, but together, Cobalion, Terrakion, and Virizion took care of Keldeo. They acted as its parents, and they taught it knowledge and moves for survival. Keldeo eventually grew and even surpassed the three Pokémon. One day, Keldeo took off from the forest with no one knowing why.

20. When the four meet again, they teach Keldeo the move Secret Sword.

21. Keldeo, along with Meloetta, are the only Mythical Pokémon to learn their signature moves from an external source.

22. Keldeo shares its trait of running across water with Suicune, another quadrupedal Water-type Pokémon.

23. Keldeo is the lightest and smallest of the Swords of Justice.

24. Keldeo’s Attack and Special Attack stats are the reverse of Terrakion’s, while their other stats are identical.

25. Keldeo’s Resolute Form in Generation VIII is the only instance of a form becoming a temporary battle-only transformation despite previously being an indefinite transformation that occurred on both the field and in battle.

26. Keldeo is most likely based on the legend of the kelpie, a supernatural water horse that sometimes appeared as a lost pony. Keldeo is also likely based on the kirin, also referred to as the “Chinese unicorn” which are often depicted with a single backwards curving horn and possess the ability to walk on water. Keldeo also draws inspiration from the character of d’Artagnan from the novel The Three Musketeers. Like d’Artagnan, it is the latest and youngest addition to the group. Keldeo’s tail also resembles d’Artagnan’s trademark feathered cap.

27. Keldeo may be derived from kelda (Old Norse for spring/fountain) or may be a combination of kelpie (a water horse from Celtic folklore) and rodeo (a sport involving skills with horses, cows, and other livestock). It may also involve deo (Latin for god).

28. Keldeo debuted in Kyurem VS. The Sword of Justice. In the movie, it was training in order to learn how to use Sacred Sword so it could become one of the Swords of Justice. Along with the other Legendary Pokémon present in the movie, Keldeo can speak through telepathy.