Round 71[edit]
This round contains three Iety, four unnamed icicle-like enemies and six Pegons; a P-Ball and Marmalade Jar will also appear at some point, which can be collected for a temporary increase to maximum power and permanent power increase respectively. The icy platforms are also automatically slippery.
Round 72[edit]
This round contains five Iety, six unnamed icicle-like enemies and three Pegons; a Blue Hammer and Water Jar shall also appear at some point, which may get collected, for the ability to throw it at the enemies, and a speed increase respectively. The icy platforms are also (again) automatically slippery.
Round 73[edit]
This round contains one Iety, three unnamed icicle-like enemies, four Pegons, and three Crystalmen; a King and Marmalade Jar will also appear here, which can be collected for a temporary freeze and another power increase respectively. The icy platforms are also once again automatically slippery - and as with the third world, the four small platforms shall fall down when Bob and Jim hit them with their hammers (and stun any enemy they land on).
Round 74[edit]
This round contains two Hiruda and four Crystalmen; another P-Ball shall also appear here, which can be collected for another temporary increase to maximum power. The icy platforms are also, yet again, automatically slippery - and each of the 94 ice blocks must be hit, if you want to destroy them.
Round 75[edit]
This round contains seven Hiruda and two Crystalmen; no powerups will appear here, and the icy platforms are, for a fifth time, automatically slippery.
Round 76[edit]
This round contains four Hiruda, and four Pegons; a Gray Hammer and Marmalade Jar will also appear, at some point, which can be collected for an increase to maximum power and a third power increase respectively. The icy platforms are also, for a sixth time, automatically slippery - and the four small platforms shall again fall down when Bob and Jim hit them with their hammers (and stun any enemy they land upon, but they can still recover).
Round 77[edit]
This round contains four Hiruda and five Pegons; a third P-Ball and another Water Jar shall also appear, which can be collected for a third temporary increase to maximum power and another speed increase respectively. The icy platforms are also, for a seventh time, automatically slippery - and the four small platforms will once again fall when Bob and Jim hit them with their hammers (and stun any enemy they land on, but they can still recover).
Round 78[edit]
This round contains two Hiruda and four Crystalmen; a third Water Jar shall also appear at some point on it, which can be collected for a third speed increase. You must also hit each of the 75 ice blocks with your hammers to destroy them - and as the platforms aren't icy here, they are not slippery.
Round 79[edit]
This round contains eight Crystalmen; another Gray Hammer will also appear at some point which can be collected for another increase to maximum power. You must also hit each of the 54 ice blocks with your hammers to destroy them - and again, as the platforms are not icy, they are not slippery.
Round 80[edit]
This round initially doesn't appear to contain any enemies; however, the illusion will soon be shattered when the hermit crab boss from the end of the third world comes down from the top of the screen (see Round 30, for a full description). Although there are no ice blocks that must be destroyed this time (as opposed to 32 of them), the premise is still the same - and once you have defeated him, you shall receive 5000 points and go on to World 9.