(Got drowned out by the audio because I forgot to adjust it. Sorry!)
A few useless facts about classic Mortal Kombat and Trilogy in particular:
- Noob Saibot appeared as far back as Mortal Kombat II as a hidden character, but was never actually playable until the home ports of UMK3/Trilogy. In each of his prior incarnations he was simply a palette-swapped version of Scorpion (save for Mortal Kombat 3, where he was a dark version of Kano).
- Ermac was based on an alleged bug in the original Mortal Kombat that would cause Scorpion's palette to change to a bright red. This, paired with a listing for "Ermacs" (Error Macros) in the game's audits, fueled rumors that there was a hidden character named Ermac. Despite numerous denials on Midway's part (even including an anagram in Mortal Kombat II's ending that deciphers to "Ermac Does Not Exist"), rumors continued until Ermac was eventually made into a playable character in Ultimate Mortal Kombat 3.
- Rain began as a hoax in the attract mode of Ultimate Mortal Kombat 3; this is evidenced by his name in the life bar being a different font than any other character's. He was actually nowhere to be found in the arcade version, but became a playable character in the home ports. His name is a reference to the Prince film "Purple Rain", as is his backstory (being a prince of Edenia who betrayed his people).
- There was a "Wavenet" version of Ultimate Mortal Kombat 3 that featured online play via a T1 connection and a playable version of Noob Saibot (complete with a unique moveset). However, it was only available in select arcades in Chicago and San Fransisco for a very short time and all known cabinets of it were eventually returned to Midway; no copies of it are known to still exist.
- Most versions of Trilogy feature a hidden character named "Chameleon" who randomly cycles through all of the male ninjas' colors, adopting their respective movesets and fatalities. The N64 version has a similar character named "Khameleon" who cycles through the female ninjas in similar fashion. Only the latter has a backstory and ending, though.
- A few deleted moves from earlier Mortal Kombat games are restored in Trilogy; MK2 Kung Lao's superman attack, Goro's spin move, Kahn and Kintaro's grab-punches, Kahn's overhead swing, Baraka's blade spin and Motaro's overhead throw all went unused in earlier games. Motaro's end screen was carried over from Mortal Kombat 3 as well.
- Sonya's Friendship changed between Mortal Kombat 3 and UMK3; it originally consisted of her swinging her arms in an awkwardly animated fashion. In UMK3 and Trilogy, she does a salute as flowers sprout from the ground.
- Motaro and Shao Kahn's AI was toned down for Trilogy, as many complained that they were too difficult in UMK3. Motaro can now be hit by projectiles (though only at close range) and Shao Kahn is somewhat less aggressive and doesn't block as much.
- Motaro and Shao Kahn have fatalities in the Nintendo 64 version of the game, though both are lazily done; Motaro rips the enemy's head off (using the same animation as his victory pose) and Shao Kahn simply hits his opponent twice with his hammer, exploding them on the second hit.