Final answer:
Irregular galaxies do not have any symmetry or regular shape and appear messy and chaotic.
Step-by-step explanation:
The type of galaxy that does not have any symmetry or regular shape is the Irregular galaxy. Unlike spiral galaxies, which have distinct arms, and elliptical galaxies, which are rounded, irregular galaxies do not have a defined shape. They often appear messy and chaotic, with no particular pattern or structure.