Funky Barrel

The Funky Barrel is a barrel in Donkey Kong Country that Donkey Kong and Diddy Kong can use to travel to other worlds and levels a lot faster. They can only travel to worlds and levels that they have already been to, though. You can get to it by going to the Funky's Flights building (Funky's Fishing in the Game Boy Advance version) and jumping into it.

The barrel resembles a regular Barrel with a tiny airplane stuck inside it. Once you hop in it you are taken to the world map screen, while a unique theme song playing. You can then choose which world and which level you want to go to like you would normally, but a lot faster. This is the only way to get to the overworld map without having to defeat a boss.

In the SNES version, you have to go to the Funky's Flights building, but in the Game Boy Advance remake, you can simply press "START" and the option for this service pops up.