In self-expanding Superhot: Mind Control Delete, you'll encounter tougher enemies closer to the end of the game. Many call them Dog, Ninja, and Addict, but these aren't the official names. A lot of players have tried to take them down without success, and because they appear near the end of the game, they can cause serious problems. Unfortunately, you cannot kill or take down these enemies. You have to find ways to avoid them and focus on beating the level.
The dog
The enemy called dog has a canine head and the body of a human. You can expect her special attack to land on you when she crouches down and rushes to your position. This will very quickly reduce the distance between you and their starting position. You need to avoid this incoming attack, but don't hide behind a wall. The dog can go through walls and catch you. It's better to focus on cleaning up what's going on in the level and use their presence as an indicator that you need to go faster.
The Ninja
The enemy called ninja wields a sword and has a bullet hole visible in the middle of his head. When you see this enemy you can expect a ranged attack as he is able to throw his sword at you, and after losing this sword he will call the weapon back to his hand. Even when they lose the sword, they continue to be a threat. You want to watch the sword, anticipate its trajectory, and then walk past.
The addict
The last boss-like character you might encounter is called the Addict. When you shoot, or get shot, by that enemy, you swap places with them. You have to consider a little more the attacks of this enemy and their positioning. If there are fewer enemies around them, you can shoot them to change position, and if they hit you, it doesn't hurt to look around to see how you can shoot the best of what will happen to you. You want to stay a lot more attentive to your surroundings when you encounter this boss-like enemy.