Shuckle is a Pokémon that resembles a small turtle. Its body is yellow and appears soft. Until they are in use, Shuckle's limbs appear limp. It is encased in a very hard red shell that has many holes in it. The holes in its shell are rimmed with white.
Rather than actively hunting and foraging for food like most other Pokémon, it collects Berries and stores them in its shell. The Berries inside are liquefied and fermented while they decompose by Shuckle's digestive juices, which it then consumes. Its digestive juices are also used to dissolve rocks so Shuckle can hide under them. It can be found in the mountains.
Shuckle, the Mold Pokémon. When Shuckle places organic materials in its husk-like shell, the items are transformed into a unique juice. Shuckle are naturally shy and are most often found hiding beneath rocks.
A Shuckle was seen under Lucy's command in Moving Past Milotic. She showed off her fair deftness by badly poisoning Emerald's Starmie, as well as taking a number of attacks, before being washed out by a Surf. She hasn't used her since.
Shuckle's stats have the greatest standard deviation of all Pokémon, with 103.21, meaning they're the most uneven out of all Pokémon. Due to this extreme distribution, it is either the best or in the bottom three of every base stat:
Shuckle has the lowest base HP stat of all Rock-type Pokémon, with only two other Pokémon, Shedinja and Diglett, having lower base HP.
Its Defense ties with MegaSteelix and Mega Aggron, but also ties with its Special Defense, which dwarves the Special Defenses of Mega Steelix and Mega Aggron, granting it the highest average defense stats of all obtainable Pokémon.
Eternamax Eternatus has a Defense and Special Defense each at 250, but is not legitimately obtainable.
Shuckle seems to be based on an endolith, an organism that lives inside porous rocks or animal shells. Given its category, the Mold Pokémon, Shuckle may be based on a fungus or mold variety of endolith. Its category could also allude to fungi such as cedar-apple rust, which bears a strong resemblance to Shuckle, or fungi-like slime molds.
Given its Bug typing, Shuckle may also draw inspiration from scale insects—small, shelled parasites that produce a sweet fluid called honeydew that attracts other insects. In particular, it may be based on the barnacle scale, with characteristics of actual barnacles. This species is part of the Coccidae family, also known as "tortoise scales", which may explain Shuckle's resemblance to a turtle or a tortoise. It could also be seen as a reference to the food fermentation process, with its Rock type alluding to the pottery used to store and ferment aliments in some cultures, and its Pokémon category referring to some fungi used in cultured foods.
Shuckle may also have been based on certain varieties of mollusk, as it shares some characteristics with them, including the shell, the muscular but limp-seeming feet, the use of acids to receive food or to break down obstacles, the liking for fermented foods, and living close to the water. Its worm-like aspect may also take inspiration from a nematode.
Shuckle may be a combination of shuck (husk) or shackle and barnacle or turtle.
Tsubotsubo may be derived from 壺 tsubo (jar) and 富士壺 fujitsubo (acorn barnacle).