Other mistake: When Celebi first heads over to Sam, the lower two segments of Scyther's thorax mistakenly have their colours swapped backward three times. (00:06:22)
Other mistake: When the person who was asked why he would like Celebi gets a device from a bag after answering the question, his right hand clips through it. Also, his right-hand goes from being two centimetres away from the edge of the right handlebar to being one centimetre away. (00:06:42)
Other mistake: When showing "In Association with" in the English dub's credits, The Pokémon Company is misspelled as "The Pokeman Company." (01:15:37)
Answer: Missingno is a glitch from the video games, and is not a real pokemon, so no.
MasterOfAll