CWU-01P

CWU-01P is a aquatic robot from the first Mega Man game. A smaller version of it appeared later in Mega Man 2 (M-445). An armored version of that one appeared in Mega Man 4 (M-422A) and an exploding version apeared in Mega Man 6 (SRU-21B). A mini version of CWU-01P appeared in Mega Man 7 (CFN-24). It's original function was to purify water.

CWU-01P
CWU-01P is the name of seven aquatic robots that rolls through the room inside of a bubble and shots three bubbles at the enemy. The seven are the same, except that they have different speed and a different color in the circle on them. The appear one by time, and when one CWU-01P is defeated, the next will be faster. Each CWU-01P defeated removes 4 HP from they total HP.

M-445
M-445 is a smaller and slower version of CWU-01P with spikes. It appears in Bubble Man's stage.

M-422A
M-422A is a lot like the M-445 except instead of following Mega Man, it drops down to try and grab him. The M-422A is also armored and invincible to all weapons. It is found only in Dive Man's stage.

SRU-21B
SRU-21B is a small, exploding version of M-445. It appears in Centaur Man's stage. They drop from above, land on the water's surface and then explode. When they explode they send three pieces of debris outward from thier domes.

CFN-24
CFN-24 is an orb-like enemy in Mega Man 7. It appears in Burst Man's stage and in the third area of Wily's Castle if you took the lower route. If shot at, it will explode, and the explosion does some damage to Mega Man.