Other mistake: When Pikachu's pain increases, his nose is missing. (00:01:51)
The March of the Exeggutor Squad - S1-E41
Continuity mistake: When Ash recalls Bulbasaur and Squirtle, his right glove disappears. (00:17:02)
The March of the Exeggutor Squad - S1-E41
Audio problem: When Jessie and James enter the box, they speak, but their mouths do not move. (00:12:30)
The March of the Exeggutor Squad - S1-E41
Revealing mistake: When Melvin is throwing Poké Balls, they appear out of thin air before he throws them. (00:11:42)
The March of the Exeggutor Squad - S1-E41
Revealing mistake: When Misty tells Ash to stop looking at the Exeggcute, Ash's left hand is layered over the Exeggcute. (00:09:03)
The March of the Exeggutor Squad - S1-E41
Revealing mistake: When Misty tells Melvin to be careful, her left arm passes through the stage. (00:05:13)
Showdown at Dark City - S1-E40
Revealing mistake: When Ash apologises to the young boys, one of the boys' left arm is disconnected from his body. (00:02:09)
Showdown at Dark City - S1-E40
Continuity mistake: When Kaz sends out his Electabuzz during the final fight, the red "K" on his shirt turns blue like the rest of the shirt. (00:12:40)
Showdown at Dark City - S1-E40
Revealing mistake: When the Yas Gym underlings send out their Pokémon to attack Ash, the Poké Balls disappear into thin air. (00:09:51)
Showdown at Dark City - S1-E40
Continuity mistake: When Yas first tells his Scyther to attack, the clips on his uniform disappear. (00:04:03)
Continuity mistake: When Ash tells the baker that he wants some bread, the left strap of his bag changes from green to white. (00:03:48)
Continuity mistake: In the shot after the title card, Ash's bag disappears. (00:02:42)
Continuity mistake: When Ash is surprised after the hippie tells him and his friends to leave, one of Pikachu's cheek pouches disappears. (00:02:34)
Ditto's Mysterious Mansion - S1-E36
Audio problem: When Ash tells his friends to help save Ditto, Misty speaks, but her mouth does not move. (00:14:26)
Continuity mistake: At the beginning of the episode, Brock's black belt turns green. (00:01:15)
Ditto's Mysterious Mansion - S1-E36
Continuity mistake: When Duplica says that she will be taking her Ditto back from Team Rocket, the white trousers on Brock's disguise turn brown, like the trousers he usually wears. (00:15:53)
Ditto's Mysterious Mansion - S1-E36
Continuity mistake: When Duplica goes over to her wardrobe to change into a Nurse Joy costume, the red brim of her Ash costume turns white. (00:06:02)
Ditto's Mysterious Mansion - S1-E36
Continuity mistake: When Ditto, as a Bulbasaur, uses Vine Whip, it is briefly drawn with nostrils, even though it had not mastered changing its face at this point. (00:05:22)
Ditto's Mysterious Mansion - S1-E36
Continuity mistake: When Ash's Bulbasaur uses Razor Leaf, its nostrils disappear, while the inside of its eyes changes from white to black. (00:05:16)
The Flame Pokemon-athon! - S1-E33
Audio problem: In the English dub, when Pikachu gets Ash back up with a shock, Ash's Japanese voice can be heard. (00:12:51)
Answer: He is a good guy but just found himself in a bad situation when he worked for Lysander. He didn't want him to harm Ash and his Pokémon when he was trying to get the special bond between Ash and his Greninja to work. He does leave Lysander and go back to being a good person.