The Ghost of Maiden's Peak - S1-E20
Continuity mistake: When Ash asks, "You remember where we're staying tonight, right?" Brock's bag is on dirt, but in the next shot, it is on grass. (00:08:37)
The Path to the Pokemon League - S1-E8
Other mistake: When A.J. is grateful when Sandshrew returns, his Butterfree's antennae are missing occasionally. (00:15:24)
Battle Aboard the St. Anne - S1-E15
Continuity mistake: When the Gentleman says, "That's enough," he has his left hand behind the left whiskers on Raticate, but in the next shot, it is below them. Also, the sign indicating a win has vanished from the end of the match before Ash's. (00:08:42)
Charmander: The Stray Pokemon - S1-E11
Continuity mistake: After Ash says, "According to my calculations, it does," the map he is holding changes design between shots. (00:02:10)
Charmander: The Stray Pokemon - S1-E11
Continuity mistake: When Nurse Joy checks Charmander's heart rate, Charmander's flame is missing occasionally. (00:10:48)
Continuity mistake: When first showing a clock, the edge of the roof is medium-brown, but in the next shot, it is dark-brown. (00:06:42)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Pikachu uses Ash's Pokédex for facts on where Pokémon want to reside, Ash's right fingers are covered by it, but in the next shot, they are not. (00:10:19)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Misty turns to look at her bicycle, the left pedal on it is higher than the right one, but in the next shot, it is lower than it. (00:16:43)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Ash leaves on the bicycle, his zipper line is black, but when he says,"I'll give it back someday!" the zipper line has changed to green. (00:17:05)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When the camera pans to Ash for the first time, the television set is aligned with what it is on, but in the next shot, it is skewed. Also, there is no wood framing around the window to the right of Ash, but in the next shot, there is. (00:02:04)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Gengar dodges, there is a Poké Ball pattern on the field, but in the next shot, it disappears. (00:01:57)
The Ninja Poke-Showdown - S1-E32
Continuity mistake: When Ash asks Aya to remove him from the wall, Misty's blue eyes turn white. (00:07:19)
The Ninja Poke-Showdown - S1-E32
Continuity mistake: When Pikachu tries to remove the webbing on himself, part of Charmander's yellow underbelly turns orange, like the rest of his body. (00:15:35)
The Ninja Poke-Showdown - S1-E32
Continuity mistake: After Aya slaps Brock, Misty's bag disappears. (00:06:52)
Electric Shock Showdown - S1-E14
Continuity mistake: After Pikachu dodges Raichu's first Body Slam, Jessie's green earrings turn blue. (00:16:53)
The Ninja Poke-Showdown - S1-E32
Continuity mistake: When Brock opens the door to the mansion, he is to the right of Ash, while Misty is to the left. But in the next shot, they swap places. (00:03:02)
The Ninja Poke-Showdown - S1-E32
Continuity mistake: When Ash and his friends notice a Venonat, Ash's bag disappears. (00:03:34)
Electric Shock Showdown - S1-E14
Continuity mistake: When Nurse Joy says she looks like the other Nurse Joys, Misty's red suspenders turn blue and her bag disappears. (00:02:13)
Electric Shock Showdown - S1-E14
Continuity mistake: When Ash says Pikachu might be able to beat Lt. Surge, part of the white bow on Nurse Joy's apron turns pink like her dress. (00:11:22)
Electric Shock Showdown - S1-E14
Continuity mistake: When Ash realizes that he is hungry, his bag disappears. (00:01:50)
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.