Humanoid mounts

Humanoid mounts were first added to World of Warcraft in Mists of Pandaria with the yeti mount Challenger's War Yeti. After this the gronnlings were designed in a similar fashion using the same animations.

Obtained via garrison mission

 * Coalfist Gronnling is the reward from the rare mission Breaker Two, and can be sold on the Auction House.

Obtained via Drop

 * Sunhide Gronnling is a guaranteed drop from the rare elite Poundfist in Gorgrond.
 * Minion of Grumpus can be found during the Winter Veil world event, and has the chance to drop from a Savage Gift, purchased for 5 Merry Supplies.
 * Craghorn Chasm-Leaper is a rare drop from Island expeditions.

Achievement mounts

 * Challenger's War Yeti was rewarded to the player in the mail after they completed Challenge Warlord: Silver, however, it is no longer obtainable.
 * Gorestrider Gronnling - Glory of the Draenor Raider.
 * Primal Gladiator's Felblood Gronnling - Gladiator: Warlords Season 1, however, it is no longer obtainable.
 * Wild Gladiator's Felblood Gronnling - Gladiator: Warlords Season 2, however, it is no longer obtainable.
 * Warmongering Gladiator's Felblood Gronnling - Gladiator: Warlords Season 3, however, it is no longer obtainable.