Rhyhorn

Despite its great HP, Attack, and Defense, Rhyhorn is outclassed by Rock-types such as Onix and Tirtouga, as they have better bulk and access to decent utility options, which Rhyhorn lacks. Rhyhorn's poor Special Defense and Speed in tandem with its common weaknesses mean that many special attackers are able to outspeed and easily KO it, which worsens Rhyhorn's defensive presence. The presence of Onix, a check to Flying-types with higher Speed and better abilities and Pawniard, a better offensive Stealth Rock setter that checks Flying-types, makes it hard to justify using Rhyhorn on any serious team.