From the Super Mario Wiki
Barnacled Bosses is one of the enemy classes listed at the end of Donkey Kong Country 2: Diddy's Kong Quest. This group includes all of the bosses from the game. This group is equivalent to "The Bosses" from Donkey Kong Country and the "Big Time Bad Guys" group from Donkey Kong Country 3: Dixie Kong's Double Trouble! One of the game's bosses, Kreepy Krow, is not included in this section, nor is he included in any group. However, in the Game Boy Advance version, Kreepy Krow is listed in this group, along with Kerozene, a boss exclusive to the GBA version.