Cyndaquil is a small, bipedal Pokémon with bluish fur on top of its body and cream-colored fur on its underside. Its eyes are usually seen closed, and it has a long, thin snout. Its arms are short, but its legs are slightly more developed and have a single nail on each foot. On its back are four red circles that can erupt into flames. When the flames are burning, its back seems to be covered in spines. Cyndaquil is capable of defending itself using these flames, and the fire grows more powerful as it becomes angry or defensive. However, if it is tired, the flames are not able to burn properly. It is usually timid by nature and often curls into a ball when intimidated. Though rare in the wild, it can be found living on grasslands.
A Cyndaquil appeared in SS009, under the ownership of Kurio. It was used alongside Fearow to create a fake Ho-Oh for his grandfather Jiei. However, their ruse was exposed when Pikachu attacked it with Thunderbolt. Cyndaquil later accompanied its Trainer to the top of the Bell Tower.
When released from a Poké Ball, Cyndaquil will aim a Flamethrower diagonally towards the ground in one direction. It is one of the easiest Pokémon to avoid, however. It can also be knocked off the screen.
Cyndaquil frighten easily, so they're often found curled up in balls. When threatened, they flare the flames on their backs to drive off enemies. Cyndaquil was one of the three Pokémon that Trainers could choose from at the beginning of Pokémon Silver, Gold, and Crystal. No one knows if their eyes are open.
Cyndaquil no longer come out of Poké Balls and instead return only as a trophy.
"A Fire Mouse Pokémon. It's a timid creature that often curls up into a ball. When threatened, it flares up the flames on its back to scare off enemies. When it's angry, it can produce powerful flames, but when it's tired, it has trouble producing fire and suffers from incomplete combustion. When it levels up, it evolves into Quilava. Its squinty eyes are adorable."
Pokémon Pinball: Ruby & Sapphire: Hitting Cyndaquil will knock it back. After a few hits, Cyndaquil will be knocked into the Egg stand and the flame on its back will start heating the Egg. Hitting Cyndaquil one more time will cause the Egg to hatch and the player will have a chance to catch the newly hatched Pokémon.
This Pokémon was unavailable prior to Generation II.
Cyndaquil's appearance is based on the echidna, but it also has traits of shrews, anteaters, and tenrecs, such as its long snout, and having little to no tail. Its closed eyes may be a reference to baby honey badgers, as its final evolved form is based on one. When its fire is lit, the fire resembles the quills of the porcupine.
Cyndaquil is a combination of cinder (ashes) and quill (referring to needle-like hairs).
Hinoarashi may be a combination of 火 hi (fire) and ヤマアラシ (山荒) yama-arashi (porcupine). It can be taken to mean 火の嵐 hi no arashi (storm of fire).