Kalos, Where Dreams and Adventures Begin! - S17-E1
Continuity mistake: When a Fletchling lands at a kitchen window's wooden slat, the slat is one centimetre past the window, but in the next shot, it is four centimetres past. (00:00:08)
Giving Chase at the Rhyhorn Race! - S17-E7
Continuity mistake: When Serena says that she wanted to meet Ash, the stripe on Ash's sleeve disappears. (00:05:16)
Giving Chase at the Rhyhorn Race! - S17-E7
Continuity mistake: When Ash and his friends look at the Rhyhorn, Ash's gloves turn completely black. This also happens when he puts on his uniform. (00:07:09 - 00:09:46)
Audio problem: After James says that Team Rocket should capture Sylveon, the sound of Wobbuffet's Poké Ball opening can be heard, despite him already being out. (00:06:27)
Continuity mistake: In one shot during Randall's flashback, the stripes on his shoes disappear. (00:09:22)
Continuity mistake: Before Ash, his friends, and the kindergartners throw their balls into the air, one of Ash's gloves disappears. (00:11:33)
Continuity mistake: When Ash and Randall are about to attempt to break the pod Pikachu is in, Randall does not have his hat, but in the next shot, it appears. (00:17:27)
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 ★