Unused look : This look is not available in the game.
Can only be used by hunters in the Beast Mastery spec. Minimum level 39 in Shadowlands.
This is the original blue devilsaur colour, which was added in the Mists of Pandaria beta test but was removed and replaced by the current blue devilsaur look before release. Hopefully it could be restored to the database and used somewhere in the game.
*Level scaling: In Shadowlands most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.