Continuity mistake: When Pikachu agrees after Professor Oak says, "That's the spirit!" he is on one tile, but in the next shot, he is on two. (00:11:08)
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 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)
The Flame Pokemon-athon! - S1-E33
Continuity mistake: When Ash says that he cannot ride Ponyta for Lara, his arms are outstretched, but in the next shot, they are at his sides. (00:08:30)
Showdown in Pewter City - S1-E5
Continuity mistake: When Ash says, "That's a great idea!" Flint's right arm is turned towards his right side, but in the next shot, it is turned forward. (00:10:12)
The Water Flowers of Cerulean City - S1-E7
Continuity mistake: When Brock asks, "Shouldn't you head for Cerulean City Gym?" a street lamp goes from being present to being absent. (00:06:14)
Continuity mistake: When Officer Jenny is surprised when she notices Ash, her grip on the intercom changes between shots. (00:02:11)
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)
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.