Factual error: In the opening short "Pikachu's Rescue Adventure," in the Bellossom song and dance shot, a Poliwhirl calls itself a Poliwrath. This is obviously a mistake because of the body differences between the Pokémon.
Continuity mistake: When Ash prepares to send out Bulbasaur, the front of his hat goes from being aligned to the left of the visor to being past it. (00:06:15)
Other mistake: When Ash and friends are first seen walking up stairs, Pikachu's tail is briefly mistakenly coloured brown with a yellow base instead of yellow with a brown base. (00:15:13)
Revealing mistake: When Tracey goes around a corner on the boat, he clips through it. (00:06:04)
Revealing mistake: As Lawrence III walks up the stairs to his console, he clips through them in the process. (00:01:43)
Continuity mistake: When Melody leaves the table, Pikachu's ears are raised, but in the next shot, they are lowered. (00:17:55)
Continuity mistake: When Misty is talking about Melody at a table when having food, the palm trees in the background move and change. (00:16:09)
Continuity mistake: When Lawrence III begins walking to his console, the stand that he is near has two rectangles on the left side, but in the next shot, it only has one. (00:01:37)
Continuity mistake: When Melody is talking about becoming Festival Maiden, her left hand is facing perpendicular to and outwards from her, but in the next shot, it is facing parallel to and inwards towards her. (00:13:42)
Continuity mistake: When Maren begins talking to Carol, her left hand is on her boat, but in the next shot, it is not. (00:13:13)
Revealing mistake: In "Pikachu's Rescue Adventure", when Meowth first appears, his left arm is unpainted for a few frames.
Continuity mistake: In "Pikachu's Rescue Adventure", when Togepi falls down a hill, the pink spots on its feet turn yellow like the rest of the feet.
Continuity mistake: When Pikachu leaves the table, there is no cup next to the spaghetti, but in the next shot there is. Also, there is a straw in the cup near Misty, but in the next shot, it vanishes. Additionally, the utensils are touching each other at an end, but in the next shot they are not. (00:18:53)
Answer: Missingno is a glitch from the video games, and is not a real pokemon, so no.
MasterOfAll