Continuity mistake: When Ash and friends are going into an alley, Ash's collar changes from white, to blue, to cream, and back to blue. Also, his face changes from skin colour to white. (00:10:27)
Continuity mistake: When Oswald begins testing the joystick, there is a button that is green, but in the next shot, it is blue. (00:16:10)
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 ★