Continuity mistake: When Shelly says that Lance is not a Team Magma member, the gloves on her disguise disappear. (00:08:27)
Continuity mistake: When May and Max look at Lance's Gyarados, its red whiskers turn cream-coloured. (00:13:38)
Continuity mistake: When Lance describes his mission to Ash, the glove on his disguise disappears. (00:16:37)
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 ★