Doodoocat's Legends Addon adds some entities from the spinoff game Minecraft: Legends.

AVAILABLE PIGLINS

The Great Hog: The Great Hog has 4000 health and they have multiple types of attacks; the first attack is the Staff Smash where they will raise their staff and smash it onto the ground, dealing high damage to surrounding entities. The second attack is the Spear Swipe, where the Great Hog will swipe his spear, knocking nearby entities far off and dealing low damage. The third attack is the Energy Staff Smash, in this attack the Great Hog will smash both his staff and spear onto the ground which will cause very high damage to surrounding entities and stun them for five seconds. The fourth attack is the Spinning Charge where they will spin around continuously and deal constant damage to surrounding entities. The fifth attack is the Spear Throw which happens if their target is far away, the Great Hog will throw spears which kill full Protection IV netherite armor on direct hit and deal medium damage to surrounding entities on the spear's impact.
Pigmadillo: The Pigmadillo has 350 health and has two types of attacks. Pigmadillos will roll up into a ball and run over their targets, this attack can deal constant damage to surrounding entities. Pigmadillos will sometimes use melee attacks. They will also spawn rarely in Crimson Forests, Nether Wastes and the Overworld.
Sporeback: The Sporeback has 100 health and they also have two types of attacks. If their target is far away, sporebacks will throw warped stems that blow up and deal poison effects to surrounding entities on impact. Sporebacks will hit their target with a warped stem if they are close. Sporebacks spawn only with Horde of the Spore piglins.
Seeker: The Seeker has 30 health and they only have one type of attack; they will run onto their target and throw an explosive mushroom, this mushroom deals very high damage to the target and themselves. The seeker's attack can be cancelled if they are damaged while they are preparing to throw their explosive mushroom. The Seeker also has a Hunt and Spore variant. They only spawn with Horde of the Hunt and Horde of the Spore piglins.
Warboar: The Warboar has 70 health and they can only use melee attacks. The Warboar also has a Hoglin and Warboar variant, the Hoglin variant spawns naturally in the nether and will not attack golems. The Warboar variant spawns with Horde of the Hunt piglins.
Ancient Hoglin: The Ancient Hoglin is a large unused cutscene mob from Minecraft: Legends. They have 300 health and they have a stomp attack which deals high damage. They can also spawn rarely in the nether.
Blaze Runt: The Blaze Runt has 10 health and they can throw blaze rods that can set entities on fire. They also have a Bastion, Hunt and Spore variant.
Mace Runt: The Mace Runt has 12 health and they can swing and smash their mace on their target. This attack is slow and it deals medium damage. Mace Runts also have a Bastion, Hunt and Spore variant.
Spore Medic: The Spore Medic has 10 health and they can heal piglins or damage non-piglins by breathing out spores. Spore Medics also have a Bastion, Hunt and Spore variant.
Piglin Builder: The Piglin Builder has 20 health and they only have one type of attack; Piglin Builders can throw explosive grenades that deal medium damage. They also have a Bastion, Hunt and Spore variant.
Clanger: The Clanger has 110 health and they can only smash their two cymbals together as their attack. This attack deals very low damage and stuns nearby non-piglins, they will also attack every mob that is not a piglin. Clangers have a Bastion, Hunt and Spore variant.
Brute/Bruiser: The Brute ( or Bruiser ) has 120 health and they only have one kind of attack, they will do a 360° degree spin and deal constant medium damage to close entities. Bruisers only spawn with Horde of the Bastion piglins.

AVAILABLE GOLEMS

Plank Golem: The Plank Golem has 35 health and can be tamed using arrows. They could also be crafted from Oak Planks, Lapis Lazuli and Ghast Tear. Plank golems will shoot wooden darts on monsters and piglins.
Cobblestone Golem: The Cobblestone Golem has 75 health and they could be tamed using Cobblestone. They can be crafted from Cobblestone, Lapis Lazuli and Ghast Tear. Cobblestone golems have a melee attack that deal medium damage.
Grindstone Golem: The Grindstone Golem has 65 health and they can be crafted from Iron Ingot, Lapis Lazuli and Ghast Tear. They could be tamed using Iron ingots and they have two types of attacks; the Grindstone Golem will mostly roll into a ball like the Pigmadillo and run over their target. They will also use melee attacks sometimes.
Mossy Golem: The Mossy Golem has 50 health and they can be crafted from Moss Block, Lapis Lazuli and Ghast Tear. They could be tamed with a Moss Block. Mossy Golems will not attack, rather they would heal damaged players and golems.

AVAILABLE FIRSTS

First of Stone: The First of Stone has 700 health and they could be tamed and healed with Cobblestone. They have two types of attacks; if they are close to their target, they will slam both arms on the ground and deal high damage to their target and surrounding monsters. If their target is far, they will throw a boulder that deals high damage on direct impact and deals low damage to surrounding monsters. They could also be found rarely in plains biomes.

AVAILABLE MOUNTS

Regal Tiger: The Regal Tiger has 100 health and they could be tamed with Salmon and Cod. They will also avoid piglins if they are not being rode. Regal tigers are peaceful, they do not have an attack and they will not fight back if hit. They will also spawn in mesa biomes.

Disclaimer: I did not copy these models and textures from other Legends content. Models, textures, behaviors and animations are reconstructed from Minecraft: Legends footage and wiki information. Thank you for understanding.