The Stuffed Bellbloom is a member of the Pinotta Family in Hey! Pikmin. They stock Sparklium Seeds in their body, it will release most of those seeds when it is attacked. They can also contain treasures that are released after their death.
The Stuffed Bellbloom usually move by jumping around the area where they are found. They do not try to activelly harm Captain Olimar but if they happen to land on him after a jump, he will take damage. throwing Pikmin on its back will eventually kill it.
Hey! Pikmin log
"Its body is stuffed with seeds to keep it going through the winter. It might drop a few if you hit it, but it might also drop something stuffed with energy!"