Morgrem is a somewhat humanoid Pokémon, with a magenta upper body and a light green lower body divided by a zig-zag line. It has long, lanky arms with hands that have three sharp fingers, and round feet that have three toes. Just like its pre-evolution, Morgrem has prominently large ears and eyes, long white fangs, a purple tongue, and an upturned nose with a single nostril. However, Morgrem's pupils are red instead of black, and its nose is longer. Morgrem has long, black hair with a bang that covers its left eye; the end of the hair is shaped like a pole arm.
Morgrem lacks confidence in its physical strength, so it makes up for it with cunning and dirty tactics. It feigns surrender by going down on all fours to lure its opponents, before it stabs them with its hair. It tends to lure people into the woods where it lives. Like Impidimp, Morgrem feeds on negative emotions. Some people believe that Morgrem has the ability to make crops grow. Morgrem is very popular with people who have gloomy thoughts. Morgrem and its evolutionary relatives are male-only species.
Morgrem and its evolved form, Grimmsnarl, are the only known Pokémon capable of learning the move False Surrender. In Generation IX, Confide is also one of its signature moves.
- No Pokémon have the same type combination as Morgrem and its evolutionary relatives.
- Morgrem shares its category with Purrloin. They are both known as the Devious Pokémon.
- Morgrem, Hattrem, and their evolutionary families can be considered counterparts.
- Both are Generation VIII Pokémon evolving once at level 32, then at level 42.
- Morgrem and its evolutionary relatives are male-only, while Hattrem and its evolutionary relatives are female-only.
- Each Pokémon in each evolutionary line has the same base stat total, base experience yield and catch rate as their counterpart (e.g. Morgrem and Hattrem both have a base stat total of 370), except for Hatenna and Impidimp's catch rate.
- These two evolutionary lines are next to each other in the National Pokédex, the Galar Pokédex, the Crown Tundra Pokédex and the Paldea Pokédex.
- Both evolutionary lines share similarities with mythical beings from European folklore and mythology: Morgrem's family shares traits with goblins, and Hattrem's family shares traits with witches.
- Both final evolutions are Fairy-type Pokémon based around long hair that have their Speed drop upon evolution.
- Both final evolutions are the signature Pokémon of a rival in Pokémon Sword and Shield who is a succeeding Gym Leader and Gigantamaxes it (Marnie's Grimmsnarl and Bede's Hatterene).
- Morgrem and its evolutionary relatives are the only Pokémon that are in the Fairy and Human-Like Egg Groups.
Morgrem may be inspired by the Cluricaune of Monaghan, a type of devious leprechaun from Irish folklore that bows down to lure its opponent and stab their eyes with its pointed hat. Its upper body also shares similarities with the redcap, a murderous goblin from English legend that carries a pikestaff, which Morgrem's hair seems to be shaped like. As its name implies, it may also be based on gremlins. Its lower body, together with its signature move False Surrender, could also be a reference to the Green Knight in Arthurian legends.
Morgrem may be a combination of morbid or morgue and gremlin. It may also come from grem, an old English and old German word for "to anger or to enrage".
Gimoh may be a combination of 欺罔 gimō (deception), 毛 mō (hair, fur), and demon.