Try to Study! Pokémon Trainer's School! - S6-E15
Continuity mistake: When Tommy says, "Today, we'll finish up what we started yesterday, Anita has her hands raised, but in the next shot, they are lowered. Also, her case does not have metal parts on the front corners and the back right corner, but in the next shot, it does. (00:10:04)
A New Land! A New Adventure!! - S6-E1
Continuity mistake: When Professor Birch gets Treecko's Poké Ball, another one is upside-down, but in the next shot, it is upright. (00:16:59)
All Things Bright and Beautifly! - S6-E13
Continuity mistake: When the receptionist says that Jessie's Contest Pass is invalid, the part of her shirt directly below her collar is white, but in the next shot, it is blue. (00:03:52)
Continuity mistake: When Ash is talking about the artifact Professor Alden is holding, the button on his jacket intermittently goes from being present to being absent and then back to present. (00:12:00)
All Things Bright and Beautifly! - S6-E13
Continuity mistake: When the receptionist says that there are no more spots left in the Pokémon Contest, the part of her below her collar is white, but in the next shot it is blue. Also, there is a flowering pot at an end of a desk, but in the next shot, there is not. (00:04:14)
Try to Study! Pokémon Trainer's School! - S6-E15
Continuity mistake: When Ash is first talking with Professor Oak, he does not have his rucksack, but in the next shot, he does. (00:05:25)
Continuity mistake: In her initial appearance, May is a little taller than Ash. In subsequent episodes, May is slightly shorter than him.
The Startling Yamirami! - S6-E29
Continuity mistake: When Ash and his friends eat the sandwiches, May's white skirt turns red like her shirt. (00:01:06)
The Startling Yamirami! - S6-E29
Continuity mistake: When Corphish slices a root, one of its pincers turns completely red. This also happens shortly after when it slices the sandwiches. (00:00:36 - 00:00:58)
In the Knicker of Time! - S6-E5
Continuity mistake: After Nicholai introduces himself, the bottom of Max's shirt changes from green to yellow. (00:04:43)
In the Knicker of Time! - S6-E5
Continuity mistake: When Nicholai notices that May and Max are wearing shorts, Max's brown shorts turn blue like Nicholai's. (00:04:13)
A Corphish Out of Water - S6-E24
Continuity mistake: When Ash tells Corphish to use Crabhammer, its pink mouth turns cream-coloured like its underbelly. (00:09:15)
A Corphish Out of Water - S6-E24
Continuity mistake: When Ash and May are eating breakfast, they do not have their gloves on, but after Team Rocket recites their motto, they appear on them. (00:04:26)
A Corphish Out of Water - S6-E24
Continuity mistake: When Corphish knocks Ash into the air, its pincer turns completely red. (00:01:15)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: When Seviper and Cacnea are affected by Screech, the green spikes on Cacnea turn yellow. (00:18:04)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: When Ash tells Corphish to use Crabhammer, his bag disappears. (00:17:24 - 00:18:19)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: At the beginning of the episode, May's bandanna changes from white with a red lining to red with a white lining. This also happens after the King of Tricks falls into the river. (00:00:02 - 00:11:28)
Continuity mistake: When Ash asks what they know about losing, the brown linings on Brock's jacket turn orange. This also happens when Ash runs out of the Pokémon Center. (00:18:12)
On a Wingull and a Prayer - S6-E18
Continuity mistake: When the Team Aqua Grunt says that he will stop hurting Peeko if Mr. Briney gives him his boat, his glove disappears. (00:09:31)
Try to Study! Pokémon Trainer's School! - S6-E15
Continuity mistake: After Ash says that he was joking, the collar of Max's shirt changes from white to green. (00:01:24)
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.