This is 'Gangplank Galleon'. This is the battle against King K. Rool in "Donkey Kong Country" for the Game Boy Color. He is the seventh and final boss of the game.
The first thing you'll notice is the music. This ship theme was taken from "Donkey Kong Land" for the Game Boy and Super Game Boy.
K. Rool is harder in this version, because after the fake credits, he gets up and starts hopping pretty fast. And he also hops pretty low, making it harder to avoid him. In the SNES and Game Boy Advance versions, he doesn't hop as low as he did in the Game Boy Color version. As you hit him, he hops slower.
Difficulty numbers 1-10:
1. Very easy
3. Fairly easy
4. Slightly easy
6. Slightly hard
7. Fairly hard
9. Very hard
10. Extremely hard
Difficulty on this boss:
Requested by mariofan96.
EDIT: Hmm... over 50,000 views. Thanks, everyone.
UPDATE: To be honest, I don't like the Game Boy Color version of this game. I don't know about you guys, but I prefer the SNES and Game Boy Advance versions.