You are in the cave "Fortress of Bricks". As you fall into the first sublevel with your Pikmin, you sees this Red Bulborb, but it have on its top... A stem?? It is also being followed by other baby Red Bulborbs that have this same stem sprouing from them...

You decides to send your Pikmin to attack this odd bulborb until it is defeated and dies... The juveline bulborbs begin to panic and scatter to their parent's death... But when you whistles, they react and walk to you, looking at you curiously... Its the Bulbmin...