Slimey

 Slimey is a virus from Mega Man Battle Network 3. It hops towards its target on the same row and change the color of each panel that it hits to its own color. After it reaches the end of the row, it will home in on its target to hop onto it and damage it.

Slimey
 Slimey is a pink variant.

Slimer
 Slimer i s a blue variant.

Slimest
 Slimest i s a yellow variant.

SlimeyΩ
 SlimeyΩ i s a gray variant.