Continuity mistake: When Professor Oak asks, "Are you there already?" there are lights and moulding on the screen, but in the next shot, there are not. (00:06:31)
Continuity mistake: When the computer in Professor Oak's laboratory turns on, there are no lights or moulding, but in the next shot, there are. Also, the raised ceiling's limits to the left and right cannot be seen, but in the next shot, they can. Additionally, three panels are on the screen, but in the next shot, there are five. (00:06:29)
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 ★