Goomba's Fortress is the sixth and final level of World 1, as well as having World 1's boss. It is inhabited and run primarily by goombas, hence the name. There are also revealed to be bob-ombs here as when crossing one of the bridges, a goomba uses the Trumpet to summon an assault of bob-ombs. It is fairly easy to avoid these bob-ombs before they explode attacking you, but if you defeat them you can occasionally get bomb stickers. Paragoombas are introduced here.