Blacky! Battle During a Dark Night!! - S4-E14
Continuity mistake: When Ash gets his Pokédex, the black part on his bag's left strap goes from present to absent and back to present. (00:02:16)
Where's Kakureon!? Huge Chaos Created by the Invisible Pokémon! - S4-E48
Continuity mistake: When Ash asks, "What kind of Pokémon are they, Miss?" there is no chandelier, but in the next shot, one appears. (00:03:25)
Muchul Is Daydreaming!! Do Superstars Like Pokémon? - S4-E46
Continuity mistake: When Ash uses his Pokédex, his left hand is turned, but in the next shot, it is straight. (00:02:08)
Tsubotsubo vs Madatsubomi - S4-E13
Continuity mistake: When Ash uses his Pokédex to find facts on Shuckle, his right index finger and the one below it are near the top of the portion of its screen, but in the next shot, they are near the centre of it. (00:05:12)
Kogane Gym! Speed & Power!? - S4-E1
Continuity mistake: When Ash uses his Pokédex to find facts on Miltank, his right index finger is on the top of the main portion of the Pokédex while the one below it is near the top, but in the next shot, the former is near the top while the latter is at the centre. Also, in the latter shot, the buttons on the Pokédex are ten millimetres away from each other despite being five millimetres away three episodes before. This is due to the latter shot using the same positioning of Ash's hand as seen in "Hot Matches!" (00:16:01)
Where's Kakureon!? Huge Chaos Created by the Invisible Pokémon! - S4-E48
Continuity mistake: When Misty says, "From the outside, you'd never know it looks like this!" the ornaments on the wall are four centimetres thick, but in the next shot, they are two centimetres thick. (00:02:44)
Muchul Is Daydreaming!! Do Superstars Like Pokémon? - S4-E46
Continuity mistake: When Misty says, "Ah, what an adorable Pokémon!" the alley behind Ash is two tiles wide, but when Pikachu is first on the ground with Smoochum, it is one tile wide. (00:02:03)
Where's Kakureon!? Huge Chaos Created by the Invisible Pokémon! - S4-E48
Continuity mistake: When Ash asks, "Where are they?" there is a chandelier, but when the Kecleon show themselves, the chandelier disappears. (00:03:30)
Flap, Yanyanma! Fly to Tomorrow's Sky!! - S4-E20
Continuity mistake: When Ash uses his Pokédex, there is an antenna on it, but in the next shot, it disappears. (00:00:18)
Flap, Yanyanma! Fly to Tomorrow's Sky!! - S4-E20
Continuity mistake: When the crowd scrutinises, the lumber on the bakery is medium-brown with a beam equidistant from the cupboard and the front window, but when the baker has Zachary look at the destruction at the bakery, the lumber is dark-brown with the beam more aligned to the right. (00:13:48)
Flap, Yanyanma! Fly to Tomorrow's Sky!! - S4-E20
Continuity mistake: When a crowd turns to look at Zachary after the ice sheets have melted, the lumber on the bakery is dark-brown with a three-by-three cupboard with bread in the two top cubicles and the centre cubicle to the left, but in the next shot, the lumber is medium-brown with a two-by-three cupboard, and the bread in the aforementioned cubicles have disappeared along with their plates. (00:13:41)
Miltank! Revenge Battle!! - S4-E2
Continuity mistake: When Nurse Joy says that on some occasions, Pokémon are not the ones who need to recover after matches, Misty goes from having a gap between her and Ash to not having one. (00:02:13)
Kogane Gym! Speed & Power!? - S4-E1
Continuity mistake: When Misty says, "Wait for us!" the sign on the front of the burger restaurant is 30 centimetres away from the trim on it, but in the next shot, it is fifteen centimetres away. (00:02:05)
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.