In this world, Ingo's disappearance has resulted in the corruption of a large portion of Generation 5 data, resulting in Brother's altered appearance and behavior, as well as many other points centered around the entirety of the Nimbasa City section.

Brother's data inexplicably managed to breach the code of Legends Arceus, resulting in poor Ingo experiencing a plethora of terrible Brother-based nightmares and hallucinations :(

Attempting to enter the Battle Subway while using a Brother-affected copy of BW/BW2 will crash the game and fry your console. The screens will only be able to display jittery noise afterwards.

Despite the harm he causes, none of it is intentional. It all stems from a massive deal of grief and despair that he has no control over. It affects the game via an overload of excessive fake 'battle' tasks that overwhelm the system and crash it.

Brother is extremely clingy. While he refuses to speak his own name, he will hover extremely close to anyone who knows it and addresses him by it (very few)

Brother is more aggressive than regular Emmet and is prone to mood swings.

Never ask Brother about Ingo.