Master Necky Snr.

"It's just like the old days, reusing the boss, changing it's color and pretending it is something completely new!"

- Cranky Kong (Game Boy Advance version of Donkey Kong Country)

Master Necky Snr. is the former leader of the Neckies before being defeated by Donkey and Diddy. He is the sixth boss in Donkey Kong Country, found at the very end of Chimp Caverns.

SNES/Game Boy Color
When engaged in battle, Master Necky Snr. rears his head and spews out a coconut. This means that Donkey and Diddy must avoid the coconut and use the tire in order to pounce on Master Necky Snr.'s head. After each hit, however, another coconut is spewed out by him in his turn of attacking depending on how many hits he has taken. Master Necky must be pounced on the head five times to be defeated.

Game Boy Advance
In the Game Boy Advance version, Master Necky returns to assist Master Necky Snr. In fact, the level itself was renamed "Necky's Revenge". In the battle, when it starts, the two both fire coconuts, but only do one at a time regardless of how much they are hit until KO'd. Once one is down, the other resumes the attack pattern of the remaining Necky. They both must be defeated in order to get to Gangplank Galleon to fight King K. Rool.

Trivia

 * American players of Donkey Kong Country have wondered why his name isn't spelled "Master Necky Sr.". This is because Rare is based in the United Kingdom, and "Snr." is how the word "senior" is abbreviated in that country.