It never sleeps. It has to keep moving because if it stopped, its magma body would cool and harden.
Silver
A common sight in volcanic areas, it slowly slithers around in a constant search for warm places.
Crystal
These group together in areas that are hotter than normal. If it cools off, its skin hardens.
Ruby
Molten magma courses throughout SLUGMA's circulatory system. If this POKéMON is chilled, the magma cools and hardens. Its body turns brittle and chunks fall off, reducing its size.
Sapphire
SLUGMA does not have any blood in its body. Instead, intensely hot magma circulates throughout this POKéMON's body, carrying essential nutrients and oxygen to its organs.
Emerald
It is a species of POKéMON that lives in volcanic areas. If its body cools, its skin hardens and immobilizes it. To avoid that, it sleeps near magma.
FireRed
A common sight in volcanic areas, it slowly slithers around in a constant search for warm places.
LeafGreen
It never sleeps. It has to keep moving because if it stopped, its magma body would cool and harden.
Diamond
Its body is made of magma. If it doesn't keep moving, its body will cool and harden.
Pearl
Stadium 2
It never sleeps. It has to keep moving because if it stopped, its magma body would cool and harden.
TCG
Slugma: This Pokémon is often seen crawling around in volcanic regions.