The Thick Club (Japanese: ふといホネ Thick Bone) is a type of held item introduced in Generation II. It boosts the Attack stat of a Cubone or Marowak that holds it.
If held by Cubone or Marowak, doubles its Attack stat.
In Gold, Silver, and Crystal, if a Pokémon's stat reaches 1024 or higher (such as due to a held Thick Club), it will be reduced to its value modulo 1024.
A Thick Club appeared in Showdown At Linoone as one of the items Tokin picked up.