These are the first sets of stages which you could visit in any one of four different dimensions. They are also the first set of stages you can visit in Dimension 5. If you are still in Dimension 2, you will not be able to visit Dimension 5 by the end of the game.
These stages contain red asteroids for container objects. Unlike the brown asteroids which you encountered previously, these asteroids must be shot eight times before they are destroyed. Because of this and their size, they are fairly effective at blocking your shots at enemies above them until you manage to remove them from the screen.
These stages also mark the introduction of the large Babbits which escort enemies on to the screen. Unlike the Chicks or the Darumas, Babbits dive bomb towards your Fighter on their way out instead of flying through the top of the screen. Be especially aware of Babbits after they drop off the enemies they escort to the formation.
In the following stages, zakos may transform into Bees (shown left). Bees break out in a horizontal line before they group into pairs that loop around each other once before dropping down to the bottom of the screen. If they reach the bottom, they will loop around once more before leaving.
In Dimension 2, the fifth bonus stage features an enemy called Dokuro, which means skull. There are a number of occasions throughout this bonus stage when only one enemy will be present, zipping around the screen.
A single Dokuro enters from the right and crosses the middle of the screen to the left, pausing and hovering in a couple of locations along the way.
Five Dokuros appear from the lower right corner, travel up the middle and loop around the screen before heading back out through the lower right.
The third wave is the mirror image of the first, featuring a Boss Galaga instead of a Doruko.
The fourth wave is the mirror image of the second, featuring six Dokuros.
The fifth wave is identical to the first, but with a Boss Galaga.
The sixth wave is identical to the second, but with seven Dokuro.
Two Boss Galagas appear doing a mix of the first and third waves simultaneously.
Two groups of seven Dokuro appear doing a mix of the second and fourth waves simultaneously. This is one of the hardest waves to get completely. You'll have to lead one group in as it enters from one side, remove it completely before switching to the other side, and then remove the second group on their way out.
In Dimension 3, the fifth bonus stage features an enemy called Hiyoko, which means chick. There aren't many waves here, and they tend to move quickly. Most enemies come close to the middle, and it is possible to clear the stage without moving from the center if you time your shots very carefully. But if you truly want to hit everyone, you'll have to anticipate firing at one group as they appear on the screen from one side or the other, and tackle the second group when it's closer to the center.
Five Hiyokos will appear from the lower left and five will appear from the upper right. They will pass each other in the middle and loop around each other before returning to the corners they initially appeared from and exiting.
The second wave is the mirror image of the first wave.
Five Hiyokos will appear from the upper left and five will appear from the upper right. They will pass each other in the middle and loop around each other before flying down to the lower left and right corners and exiting.
The fourth wave is the same as the third wave flipped vertically, and it contains four Boss Galagas mixed in with the Hiyokos.
In Dimension 4, the fifth bonus stage features Babbits, smaller versions of the deadly opening escort Babbits that began to appear in these sets of stages. This bonus stages alternates between small and large groups of enemies.
Two Babbits appear from the lower left and upper right corners of the screen. They quickly loop around each other, before whisking away to the upper left and lower right corners.
Eight Babbits appear, four from the left and four from the right. They enter the screen and circle around each other near the top. Then they drop down through the middle of the screen and exit through the lower left and lower right corners.
The third wave is a mirror of the first wave.
The fourth wave is a mirror of the second wave.
The fifth wave is identical to the first wave, but featuring two Boss Galagas.
The sixth wave is a vertical flip of the second wave.
In Dimension 5, the fifth bonus stage features Aliens, but not just any aliens; these are an alternate version of the invaders which appeared in the original Galaxian. The first bonus stage in Dimension 5 presents the targets in single file lines which separate briefly before coming back together and leaving.
Ten Aliens appear from the upper right corner, dive down to center of screen, then split up into groups of five making two loops in the middle and the right. They gather back, loop up to the left, and then down to the lower right corner.
The second wave is a mirror of the first.
Ten Aliens come down from the top just left of center. When they approach the bottom, they split up a bit, some going left and some going right, before double backing up to the top in a single file. They perform one split loop before leaving.
The fourth wave is a mirror of the third, but with four Boss Galagas included (all of whom go left when the line splits.)
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