Official description copy pasted from the official Pokémon website
Mega Malamar
Malamar’s brain has become enlarged as a result of Mega Evolution. Greatly enhanced psychic power overflows from its body, emitting a bright glow. This vividly colored light further amplifies the Pokémon’s hypnotic abilities, allowing it to freely overwrite the personalities or even memories of others—a terrifying power that can make someone seem like an entirely different person.
Its glowing, undulating tendrils are able to pick up on the feelings of those around it. It prefers battling with efficiency, using its powerful intellect to analyze the situation with levelheadedness as it fights. Mega Malamar views others—even Pokémon Trainers—as its pawns. If it disagrees with an order given to it by a Trainer, it will sometimes respond by hypnotizing them, making this an incredibly difficult Pokémon to interact with.
It appears that Mega Malamar has recently been spotted using its hypnotic abilities on citizens of Lumiose City, creating the boom in popularity for the Pokémon recently observed in a
special videoand across the
Pokémon social media channels. For a special report investigating the truth behind Mega Malamar’s recent activities in Lumiose City, please visit the
official Pokémon YouTube channel.
It’s also staying Dark/Psychic and is taller than I thought at 9’6” (2.93 m) so that’s pretty freaky