Where do you get the power bomb?

In chozodia, after you get the fully powered suit, go down the shafts until you are at the second save station from the top. Go right and up into the blue territory on you're map. Go all the way up the shaft and to the left, up that and go to the next save station you see. Now go to the blue door in the shaft two rooms down, not the red one. In the next room, go into the blue door again.now follow the blue doors until you get to a room that doesnt have one.

On the far side of that room, there is a shaft you can go down in morph ball mode go all the way down until you hit a ceiling of a room. After the space pirates leave the room, go to the left of the ceiling and lay a morph ball. Now go into the room holding the power bomb. If you don't want to deal with Space Pirates, space jump over the beam and land on the power beam. Congratulations, you got the power bomb.

You push them back; then you plant bombs when they attack, or attack the first one from below with the wave upgrade