Mystery at the Lighthouse - S1-E13
Revealing mistake: When the costume's right arm falls off, the shell is not fully coloured in. (00:12:32)
Mystery at the Lighthouse - S1-E13
Revealing mistake: As Krabby's Poké Ball begins wobbling, the light on it briefly shifts to the left. (00:04:36)
Mystery at the Lighthouse - S1-E13
Revealing mistake: When the costume's left arm falls off, the shell is not fully colored in. (00:12:33)
Mystery at the Lighthouse - S1-E13
Revealing mistake: When Professor Oak puts tofu in a bowl, the tofu is briefly shown behind it instead of in it with the ladle it is on having a line from the bowl showing through it. Also, when he gets it out, the tofu is not fully coloured in. (00:09:02)
Mystery at the Lighthouse - S1-E13
Revealing mistake: When first showing Ash and friends at the top of the lighthouse, Pikachu is floating in midair. (00:15:00)
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 ★