In Blind Date, The Mole was supposed to go on a date with Giggles. Due to a misunderstanding, however, he goes on a date with Lumpy instead. He is, however, seen with Giggles in the Love Bites short Cold Hearted.
The credits of the Halloween episode Can't Stop Coffin state that The Mole is voiced by Dean MacDonald. However, The Mole does not speak at all. This is a joke that was also used in the previous episode, Read 'em and Weep, with Cro-Marmot. In reality, Dean MacDonald is an animator of Happy Tree Friends.
He is the only handicapped main character without any known mental disorder.
The Mole is able to eat things off-screen, as is shown in the episodes Blind Date and Can't Stop Coffin, even though we never see his mouth, similar to how Handy and Cro-Marmot can perform hand-related tasks off-screen.
Although he almost never notices his mistakes, he may have some vision or other reliable senses. An example of this is in Wrath of Con, where he actually notices that Sniffles is missing his pass (though this could be explained by Sniffles' annoyed grunt when he notices he is missing his pass and The Mole could have picked up on this).
Despite his overall kind nature, The Mole seems to be extremely stubborn, acting like he can see when he cannot. Others speculate that he is a sadist and only pretends not to notice.
Mime also happened to die and revive in the same two episodes as The Mole did, but The Mole is counted as the 17th since he appeared after Mime in Out of Sight, Out of Mime.
The Mole has had the second most careers out of all the characters, with only Lumpy having more.
He is the only male character to appear in all of Disco Bear's starring roles and survive all three.
The Mole has never killed anyone nor himself in Disco Bear's starring roles.
He is the only character to co-star with Splendid, and not be killed (occurring in See What Develops).
In Internet Season 3, his alliterate sentence is: Myopic, meandering marches most often lead to macabre mishaps.
This is unusual, as myopic means nearsighted, but The Mole is blind.
Also, macabre means disturbing or horrifying because of the involvement with or depiction of death and injures, making his alliterate sentence the only one so far that acknowledges the show's violent nature.
The episode Mole in the City is the only time The Mole successfully completes his objective. Due to this, it may be likely that The Mole is better suited at being a spy than living as a normal citizen.
All In Vein is the only episode so far where The Mole expresses sadness.
His starring card in the TV series is similar to Splendid's TV starring card.
In some episodes, The Mole appears to be photo-aware (able to tell the difference between light and dark) instead of completely blind. In Gems the Breaks, he can tell both that the light changes and that Splendid's heat vision is in his way; in Stealing the Spotlight, though he somehow survives Lumpy's Christmas lights, he does attempt to shield his eyes from them; in A Sight for Sore Eyes, he notices when his light bulb malfunctions; and in Who's to Flame?, though it takes time, while in the sewer, he clearly notices that he is in a dark area and attempts to rectify that by lighting a match.
Some people thought that The Mole had no eyes, but this was proven false in Pet Peeve when it was shown that he has eye sockets.
If you choose The Mole in the Vision-O-Rama feature on the Third Strike DVD, the movie theater's screen will show nothing, even though the music and sounds from Spin Fun Knowin' Ya can be heard. This is obviously a joke on how he is blind, so he would not see anything on the screen.
The Mole has buckteeth, as can be seen in Pet Peeve. Whether or not he has a triangular frown like the other characters is still unknown.
A goof in his character design is that his ears are on the top rather than the sides of his head.
The Mole's head has gotten slightly bigger since the TV series.
The Mole is the only character who has a heart-shaped nose but lacks a philtrum.
The Mole is one of only four characters who survive three consecutive segments in the TV episodes. This happens in "Eleventh Hour" (Wingin' It, Tongue in Cheek, and Easy Comb, Easy Go). The others are Pop, Lumpy, and Cro-Marmot.
He, Cro-Marmot and Mr. Pickels are the only main characters not to make an audible noise once in the series.
He is one of the three characters who lack good vision, the other two are Russell and Sniffles.
The Mole's mole usually changes its position when he turns to the other side; much like Lumpy's antlers, Lammy's bow, Nutty's eye and candy, Russell's eyepatch and hook, Flippy's beret, Handy's tools, Sniffles' pocket protector, and Cub's diaper pin.
In Remains to be Seen, he is seen walking over the hills during the credits. This makes him the first character to be seen during a credit sequence. The only other one to date is Pop in Just Desert.
The Mole is one of the few characters to eat/drink the remains of themselves or another character, the others are Cuddles (thrice), Giggles (four times, one time offscreen), Toothy, Lumpy (twice, one time offscreen), Petunia, Nutty (twice, one time offscreen), Pop (Offscreen), Cub, (twice, one time offscreen), Flaky (twice, one time offscreen), Russell (Offscreen), and both sides of Flippy (thrice).
The Mole is one of seven characters not to have the same kind of eyes as the other characters(simply because we never see them). The other six characters are Lumpy, Nutty, Cub, Lifty & Shifty (from the TV series onwards), and Mr. Pickels.
The Mole is one of three characters to have just his name and not "starring" or "and" in his starring card in the first season of the TV series. The others are Lifty and Shifty, because of a goof in the opening credits of As You Wish.
The Mole is one of the two characters who regularly wear glasses, the other being Sniffles.