A pogobot.
Pogobots are enemies in Donkey Kong Country Returns. They are electrified enemies and are a challenge to defeat. They are only found in the Factory levels. They can be defeated in by causing a switch wall to smash them or by throwing a barrel at them. They look like a long metal rod with a light blue head emitting electricity. They hop along the level and can be avoided by ducking or walking under them as they jump over you. It should be noted that, upon hitting a wall, they will turn around and hop in the other direction.