Other mistake: When Ash and friends are first seen when a Ghost Pokémon laughs, the base on Pikachu's tail is missing. (00:07:47)
Continuity mistake: When Misty asks if Brock knows how scared it makes her feel when he yells, the purple strap on her bag turns yellow like her shirt. (00:02:04)
Continuity mistake: When Ash says, "We gotta make sure we don't get separated," Misty's right arm is violet, but in the next shot, it is skin-colour. (00:01:32)
Continuity mistake: When Brock says if there are Ghost-type Pokémon, then they can show themselves to them, he, Ash, and Misty are between a doorway, but in the next shot, they are not. (00:08:33)
Answer: There are a lot of fan theories around this, but the most common theme is that Pikachu had another trainer before Prof. Oak, who gave him to Ash. Pikachu didn't appreciate being handed over.
Ssiscool ★