Continuity mistake: When Ash turns after he wonders how the Heracross will help the Butterfree, the marks on his cheeks go from being present to being absent and then back to present. (00:03:02)
The Double Trouble Header - S3-E2
Continuity mistake: When Pikachu notices Casey and Chikorita, the part of Ash's jacket to the right of his right strap excluding the sleeve goes from blue to white and then back to blue. (00:01:26)
Continuity mistake: When Ash first uses his Pokédex, the top two fingers on the left side are together, but in the next shot, the bottom two fingers on the side are together. (00:07:35)
Continuity mistake: When Ash uses his Pokédex to find facts on Spinarak, three of his fingers are on the left side of it, but in the next shot, one is on the side. (00:05:35)
Continuity mistake: When Ash agrees to the fact that this is his first time at a Pokémon League, the front part of his hat does not go past the visor, but in the next shot, it does. (00:02:39)
Revealing mistake: When one of the staff of the Pokémon League goes over to type on the keyboard, she clips through a device in the process. (00:02:40)
All Things Bright and Beautifly! - S6-E13
Continuity mistake: When Venomoth is first eating, it is not on Chaz's right elbow joint, but in the next scene, it is. (00:04:53)
Continuity mistake: When the phone rings, it is six centimetres away from the lamp, but in the next shot, it is fourteen centimetres away. Also, the cabinet is three centimetres away from the top of the planks directly above it, but in the next shot, it is six centimetres away. (00:04:34)
On a Wingull and a Prayer - S6-E18
Other mistake: When Crawdaunt first appears, the bottom of its claws are mistakenly coloured red instead of cream. (00:09:25)
Pî to Pippi to nagareboshi! - S5-E37
Other mistake: When the camera zooms out on Ash and friends when they begin to head to the crash site, Bayleef mistakenly has the indent in her leaf on the right side of it instead of the left side. (00:04:09)
Hanecco's Jealousy! Battle in Big Prairie!! - S3-E21
Continuity mistake: When Ash uses his Pokédex to find facts on Hoppip, the end of his right index finger is covered by it, but in the next shot, it is not. (00:01:52)
Continuity mistake: When Ash uses his Pokédex to find facts on Sentret, his right index finger and the one below it are together all of the way, but in the next shot, they are apart towards their ends. (00:05:38)
Kunugidama and the Bonguri Fruit! - S3-E27
Continuity mistake: When Maizie says, "You really helped us out!" she does not have a red dot on her right cheek, but in the next shot, she does. (00:01:37)
Mysterious Superhero! Gligarman Enter!! - S3-E22
Continuity mistake: When the Pokédex is describing Gligar, Ash's left index finger and the one below it are together, but in the next shot, they are apart. (00:01:47)
Continuity mistake: When Officer Jenny is surprised when she notices Ash, her grip on the intercom changes between shots. (00:02:11)
Continuity mistake: When Ash notices that his rucksack is missing, there is a dirt area past a tree, but in the next shot, there is not. Also, there is not another one in front of a tree, but in the next shot, there is. (00:01:45)
Ubame Forest! Search for Kamonegi!! - S3-E29
Continuity mistake: When Ash mentions that he had the same problem, Pikachu goes from facing straight to facing Ash. (00:04:58)
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.