Hundemon

Gold +2: If you are burned by the flames it shoots from its mouth, the pain will never go away.

Silver / FireRed: Upon hearing its eerie howls, other POKéMON get the shivers and head straight back to their nests.

Crystal: The pungent- smelling flame that shoots from its mouth results from toxins burn­ ing in its body.

Ruby / Sapphire: In a HOUNDOOM pack, the one with its horns raked sharply towards the back serves a leadership role. These POKéMON choose their leader by fighting amongst themselves.

Emerald: In a HOUNDOOM pack, the one with its horns raked sharply back serves a leadership role. They choose their leader by fighting among themselves.

Diamond +2: Long ago, people imagined its eerie howls to be the call of the grim reaper.

Platinum +5: The flames it breathes when angry contain toxins. If they cause a burn, it will hurt forever.

SoulSilver: Upon hearing its eerie howls, other Pokémon get the shivers and head straight back to their nests.

Omega Ruby / Alpha Sapphire: In a Houndoom pack, the one with its horns raked sharply toward the back serves a leadership role. These Pokémon choose their leader by fighting among themselves.

Ultra Sun: They spew flames mixed with poison to finish off their opponents. They divvy up their prey evenly among the members of their pack.

Ultra Moon: Identifiable by its eerie howls, people a long time ago thought it was the grim reaper and feared it.