4-1 - The upper arrow trap fires quickly, while the lower one fires slowly. There are some Collapsing Floor tiles along the pathway.
4-2 - Hippity-hop is faced here.
4-3 - In this room, directly south of 4-2, the switch must be activated by a bomb blast in order to lower the obstacle below. The arrow trap fires both left and right.
4-4 - Sparky is faced here.
4-5 - In this upper-left room, Iron Balls will fall in each corridor as long as Bomberman is nearby. They fall from the empty end of each hall toward the pit at the other end.
4-6 - The switch will need to be blasted twice in order to progress further into the cave. After it has been blasted once, Bomberman will need to place the second bomb and run past the obstacle in the middle of the room before it is raised by the resulting explosion.
4-7 - Tinklebear is faced here.
4-8 - The switch will only lower the obstacles for as long as a blast is hitting it. Thus, either the Long-fused Bomb or the Remote Control must be used in order to delay the blast and allow Bomberman to get to the obstacles in time.