Substitute doll
While the substitute doll (summoned by the move Substitute) originally looked similar to Rhydon, the design evolved over time to a more neutral design. In Super Smash Bros. for Nintendo 3DS/Wii U, its trophy description points out that, while it looks and gets attacked like a Pokémon, it is not actually one. The doll has gone on to receive several pieces of merchandise, including its own plush doll and clothes.
Original Legendary beasts
It is said that the Legendary beasts Raikou, Entei, and Suicune were reincarnated by Ho-Oh after they died in the fire that burned down the Brass Tower. They were said to represent the lightning that struck the tower (Raikou), the fire that burned the tower down (Entei), and the rain that put it out (Suicune). While it is unknown in the games if these three were already a Raikou, Entei, and Suicune before they were revived, the Pokémon Generations short The Reawakening shows them as three nameless Pokémon.
Bones worn by Vullaby and Mandibuzz
According to interviews with Ken Sugimori in Nintendo Dream, the bones that Vullaby and Mandibuzz wear are those of other Pokémon. However, it is not stated which Pokémon they are from, but they bear a notable resemblance to a human skull.
Pokédex entries say that most of the bones Mandibuzz uses to decorate its nest come from Cubone. These bones could also take part in Vullaby and Mandibuzz's design.
The single dragon
Main article: Tao trioAccording to legend, Reshiram and Zekrom were once a single powerful dragon Pokémon used by twin heroes in order to create the Unova region. However, the brothers each sought something different in life—truth for the older brother and ideals for the younger—and they began to argue, then fight, over whose side was right. The single dragon, in response, split into two Pokémon: Reshiram, who sided with the older twin, and Zekrom, who sided with the younger twin. It is revealed in Pokémon Black 2 and White 2 that when the single dragon split into Reshiram and Zekrom, a third dragon, Kyurem, was "created" from the leftovers. The Pokédex entry for Kyurem also states that it is waiting for a hero to fill in the missing parts of its body with "truth or ideals". Kyurem can be fused with Reshiram or Zekrom to form White Kyurem or Black Kyurem, respectively, using the DNA Splicers, but the appearance of the single Dragon Pokémon's complete form is unknown. In The Lesson Ends Here, the single Dragon is briefly seen as a winged silhouette alongside the two heroes.
Fossil Pokémon
In Pokémon Sword and Shield, there are four types of Fossils, all of which appear to be incomplete, as they consist only of either a top half or a bottom half. Cara Liss can combine two Fossils that are opposite halves into one Pokémon, allowing half of the original prehistoric Pokémon to be seen.
- The Fossilized Drake, which forms the bottom halves of Dracozolt and Dracovish, appears to be from a heavy, spiked, dinosaur-like Dragon-type Pokémon.
- The Fossilized Dino, which forms the bottom halves of Arctozolt and Arctovish, appears to be from an Ice-type marine Pokémon.
- The Fossilized Bird, which forms the top halves of Dracozolt and Arctozolt, appears to be from a light, bird-like Electric-type Pokémon.
- The Fossilized Fish, which forms the top halves of Dracovish and Arctovish, appears to be from a marine, placoderm-like Water-type Pokémon.
However, the Pokédex entries for all four of the Generation VIII Fossil Pokémon suggest that they lived in prehistoric times, as does Cara Liss upon reviving one of them, though this information is somewhat implied to be inaccurate.
Arceus's true form
Arceus's conversation with the player after it is defeated in Legends: Arceus heavily implies that the physical, goat-like form first seen in Pokémon Diamond and Pearl is not the actual Arceus, but only a piece of its whole being. In Legends: Arceus's opening scene, Arceus speaks to the player in its home dimension: there, it appears as a large amount of bright golden energy shaped like its main form. This unknown form may be Arceus's true appearance.
Scarlet Book imagined Pokémon
In the Scarlet Book in Pokémon Scarlet, a sketch of an imaginary Pokémon inspired by the Paradox Pokémon found in Area Zero is seen, drawn by a member of the Area Zero Expedition team. This Pokémon resembles the Legendary beasts: Raikou, Entei, and Suicune and their ancient counterparts: Walking Wake, Gouging Fire and Raging Bolt.
It's implied that this sketch was drawn by a member of the Area Zero Expedition team that managed to catch a glimpse of each of the Paradox Pokémon, Walking Wake, Gouging Fire and Raging Bolt during their exploration in Area Zero.
Violet Book imagined Pokémon
In the Violet Book in Pokémon Violet, a sketch of an imaginary Pokémon inspired by the Paradox Pokémon found in Area Zero is seen, drawn by a member of the Area Zero Expedition team. This Pokémon resembles the Swords of Justice: Cobalion, Terrakion, and Virizion and their futuristic counterparts: Iron Leaves, Iron Boulder and Iron Crown.
It's implied that this sketch was drawn by a member of the Area Zero Expedition team that managed to catch a glimpse of each of the Paradox Pokémon, Iron Leaves, Iron Boulder and Iron Crown during their exploration in Area Zero.
Original Loyal Three
In Kitakami myths, it is said that the Pokémon that formed the Loyal Three were once below-average Pokémon: Okidogi was small and weak, Munkidori was clumsy and dim-witted, and Fezandipiti had short, dull feathers. The Toxic Chains wrapped around their bodies granted them the strength, cleverness, and beauty that they respectively wished for. It's later revealed that Pecharunt was the one that transformed the trio with its Toxic Chains, while also using its Binding Mochi to tame them, so they could help it complete its journey to steal a brilliant set of masks desired by its caretakers.
The trio's original appearance is currently unknown and their Typings are implied to be completely different from the ones they now possess. What appear to be their original forms are depicted alongside a human child on Kitakami's signboards.
Unnamed TCG creature
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