Rock

Attack
Rock type is super effective against Fire, Ice, Flying, and Bug

Rock type is not very effective against Fighting, Ground, and Steel

Defense
Normal, Fire, Poison, and Flying type are not very effective against Rock type

Water, Grass, Fighting, Ground, and Steel type are super effective against Rock type

Pokemon
Geodude, Graveler, Golem, Onix, Rhyhorn, Rhydon, Omanyte, Omastar, Kabuto, Kabutops, Aerodactyl, Sudowoodo, Shuckle, Magcargo, Corsola, Larvitar, Pupitar, Tyranitar, Nosepass, Aron, Lairon, Aggron, Lunatone, Solrock, Lileep, Cradily, Anorith, Armaldo, Relicanth, and Regirock