Flupperius Petallus Pongus

A Flupperius Petallus Pongus is a rare type of flower in the game, Donkey Kong Country 3: Dixie Kong's Double Trouble! As with other similar items in the game, a Banana Bird can be earned with it, by trading it to the Brothers Bear that needs it.

Super Nintendo version
Bramble is in search of a Flupperius so he can study the rare flower. He has been trying to grow one himself but can't due to the pollution of Mekanos hurting his flower's life. When Dixie and Kiddy Kong defeat KAOS in Mekanos, Bramble will say that the plantlife nearby has become healthier but his Flupperius is still in the process of growing. However by the time the Kongs beat Razor Ridge, the flower will be in bloom and can be picked up by walking to the dead-end near Bramble's cabin on the overworld map. It can then be traded to him for a Banana Bird.

Gameboy Advance remake
In the remake of Donkey Kong Country 3, the flower's role has been tweaked. Instead of having to beat Mekanos and Razor Ridge to obtain it, the flower is actually obtained pretty early in the game, by talking to Bachelor. He will give the two the flower and explain he needs a Rose instead for his date. Bramble will still gladly accept the Rose, but will instead give Dixie/Kiddy the Rose Bachelor seeks. Bramble is still in possession of the Banana Bird however, and will give it to the heroes once Mekanos is beaten.