Helioptile is a small yellow quadrupedal reptilian Pokémon that resembles a frilled lizard. It has round blue eyes and long thin, floppy deep gray ear-like appendages with yellow triangular tips which dangle from either side of its head. Helioptile's body is mainly bright yellow; its feet, the tip of its long tail and the top of its head are deep gray. Its body is slinky and thin, with tiny clawed feet and a long tail. Helioptile's head is quite large compared to its body. The top of its round head is slightly conical in shape.
A Shiny Helioptile has a bright red body with some yellow patches.
Helioptile absorbs solar rays to generate electricity. It also charges itself in the sun in such a way it doesn't need to eat. Also, when it is attacking, it opens the "ear-like" structures on its head.
Helioptile evolves into Heliolisk by the use of a Sun Stone.