Continuity mistake: When Ash is excited to see Ritchie when they are in the crowd next to the van, the people around Ash change. (00:06:41)
Continuity mistake: When the elevator doors open to the first floor, the part of the elevator indicating where it is has its background grey, but in the next shot, it is black. (00:05:31)
Continuity mistake: When Ash brings Pikachu to allow Ritchie to power the elevator, his right jacket strip goes from being absent to being present. (00:05:02)
Continuity mistake: When the power goes out in the lift, Delia's shirt changes from yellow to blue. (00:04:30)
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.