Pluck The Piranha Flower 64. The objective is to defeat the large piranha flowers. Watch for rolling rocks and pluck the piranha flower:
Super mario 64 wiki guide. In the level, jump over to the island to the far left (with the pipe). Basicall, if you're in the lake staring at the mountain, the plant you need to kill is in the back left corner on an island, if i remember correctly.
Enter the level through the painting to the left so that you start out huge.
Pluck the piranha flower thi: Kill all the piranha plants and then jump into the pipe. By being huge, you can hop these large gaps easily. Pluck the piranha flower thi: