With an abundance of rares on the Isle, it was just a matter of time before I encountered each one. Quite a few of them require some sort of interaction before they will spawn which makes it a fun endeavour to discover them all. Never-the-less I’m still surprised by the sheer number of rares on this mysterious Isle.

Archiereus of Flame

Located next to the inner wall of Ordon Sanctuary.
Drop: Elixir of Ancient Knowledge

Bufo

Croaking Hollow.
Drop: Gulp Froglet

Chelon

Interact with his ‘Conspicuously Empty Shell’ to reveal his aggressive nature

If one wasn't bad enough you get three

If one wasn’t bad enough, you get three.
Drop: Blackflame Daggers

Cinderfall

At the top of the broken bridge.
Drop: Falling Flame

Cranegnasher

Has an appetite for cranes.
Drop: Pristine Stalker Hide

Dread Ship Vazuvius

Summoned from the Mist-Filled Spirit Lantern after killing Evermaw.
Drop: Rime of the Time-Lost Mariner

Emerald Gander

One of the new tameable pets.
Drop: Windfeather Plume

Evermaw

This monstrosity moves pretty fast around the Isle, even while you’re dpsing him.
Drop: Mist-Filled Spirit Lantern

Flintlord Gairan

Follow the outer wall on the left side of Ordon Sanctuary until you see an alcove.
Drops: Ash-Covered Horn and Ordon Death Chime

Garnia

Swims in a red pool at the top of Ordon Sanctuary. One way to get to him is using the Albatross
Drop: Ruby Droplet

Golganarr Timeless Isle Rares

Under the bridge at Red Stone Run.
Drop: Odd Polished Stone

Gu'chi the Swarmer

Circles around Old Pi’jiu village.
Drop: Swarmling of Gu’chi

Great Turtle Furyshell

Found on the shore right next to the horde camp.
Drop: Hardened Shell

Imperial Python

Found him curled behind a tree stump. Shares a spawn with the other snakes. 
Drop: Death Adder Hatchling

Ironfur Steelhorn

May replace any of the yak locations on the Isle.
Drop: Tuft of Yak Fur

Jakur of Ordon

Towards the cliff of Firewalker Ruins.
Drop: Warning Sign

Karkanos

Talk to the Fisherman to summon Karkanos.
Drop: Giant Purse of Timeless Coins

Krakkanon

It only took two casts to summon this guy

Leafmender

Along The Blazing Way surrounded by sprites (67, 44).
Drop: Ashleaf Spriteling

Monstrous Spineclaw

Spawns in any Ancient Spineclaw location with a higher concentration around the horde camp.
Drop: Spineclaw Crab

Rattleskew

Event: Once you help the crew fend off some Rattling Mariners, Rattleskew will appear. (61.8, 87.7)
Drop: Captain Zvezdan’s Lost Leg

Rock Moss

Found at the back of the Cavern of Lost Spirits.
Drop: Golden Moss

Spelurk

Spawns in the Mysterious Den after using the Rock-Breaking Hammer to break through the cave-in. (59.1, 48.9) Just wait inside the cave, then use the hammer once the rocks respawn.
Drop: Cursed Talisman

Spirit of Jadefire

Found inside the Cavern of Lost Spirits. Can spawn in a few spots.
Drop: Jadefire Spirit and Glowing Green Ash

Tsavo'ka

Resides in his own little den next to the broken bridge. (54.1, 42.5)
Drop: Pristine Stalker Hide

Urdur the Cauterizer

Inside Ordon Sanctuary.
Drop: Sunset Stone

Watcher Oso

Just off the beaten path of Firewalker Ruins.
Drop: Ashen Stone

Whizzig Timeless Isle Rares

Can spawn in several locations around the Celestial Court

Wizzig is a friendly rare spawn sitting on top of a huge snail who can spawn in four locations around the Celestial Court. He sells pet biscuits, a priest glyph technique and four costumes to dress up your Perky Pug. Each costume costs 500 Timeless Coins with 5 charges each.

For those interested, here’s a video of the Perky Pug costumes.

Spawns just off Old Pi'jiu village

Spawns just off the coast of Old Pi’jiu village.
Drop: Rain Stone

Zhu-Gon the Sour

A Barrel of Skunky Brew will appear in the cantre of Old Pi’jiu village. Killing all ten ‘leaks’ will spawn Zhu-Gon.
Drop: Skunky Alemental

The notable drops are not 100% but you can check out all the rares drop pets on my Pet Additions – 5.4 post.