Easter Eggs (Morrowind)

Easter eggs are generally pop culture references and other fun topics the developers place into the game for players to find, and of which don't have any large direct impact on the game's progression.

Final Fantasy
In the Urshilaku Burial Caverns, there is a room called Kefka Burial, which is a reference to Kefka, the antagonist in Final Fantasy VI.

Fishy Stick
Fishy Sticks are normally used on the Bethesda Forums to welcome new members. Morrowind recognizes this, and included Capn's Guide to the Fishy Stick, which is entirely unreadable.

Icarus
When starting out from Seyda Neen, players will often encounter a Bosmer called Tarhiel who will quite literally fall from the sky. From him can be obtained the Scrolls of Icarian Flight, and his journal, which reveals a story similar to the legend of Icarus.

Indiana Jones
In the Omalen Ancestral Tomb, a skeleton can be found seemingly crushed under a rock, grasping for a ruby. It's identity is revealed after reading his supposed journal, titled A Dying Man's Last Words.

M'aiq the Liar
M'aiq the Liar is a recognizable name in The Elder Scrolls franchise. He's appeared in Morrowind, Oblivion and Skyrim, and served as a sort of line between the developers and the players. His page can be found Here.

One particular thing he says in Morrowind is about Weresharks, in which he says: "I have only met one, but he was afraid of the water." Which is a reference to were-creatures from Daggerfall, belatedly returning in the Morrowind expansion Bloodmoon.

When asked about multiplayer, he replies with a clear reference to L33t speak, as well as the want for multiplayer in the game, he says "M'Aiq does not know this word. You wish others to help you in your quest? Coward! If you must, search for the Argonian Im-Leet, or perhaps the big Nord, Rolf the Uber. They will certainly wish to join you."

Pokémon
Several references to Pokémon appear throughout the series. These include: Marowak's(#105) Spine, in Illunibi; the body of Peke Utchoo (Pikachu, #25), and his accompanying note; In Arkngthand, there is a Weepingbell(#70) Hall. In the Urshilaku Burial Caverns, there is a section known as Kakuna(#14) Burial.

Sun Tzu
The book by Zurin Arctus, The Art of War Magic (which also appears in The Elder Scrolls IV: Oblivion), is a reference to Sun Tzu's famous book, The Art of War.

Latin
A deceased former Census and Excise governor in Seyda Neen, Processus Vitellius's name can be translated to mean "The process of vigilance". This was likely done due to him working for Census and Excise which is an organisation dedicated to managing census counting, and for tax/excise purposes for the Empire.