Rock Egg

The Rock Egg spawns Rock-type Pokémon around you for 5 minutes. Catch as many as you can to charge the egg and improve your final reward. 
 Spawns 
 The following Pokémon will spawn around you during the egg: 
 
 Geodude 
 Rhyhorn 
 Sudowoodo 
 Onix 
 Nosepass 
 Corsola 
 Larvitar 
 Klawf 
 Klawf (New Form) 
 Klawf (Valorian) 
 Larvitar (New Form) 
 Aron 
 Cranidos 
 Bonsly 
 Dwebble 
 Dwebble (New Form) 
 Roggenrola 
 Binacle 
 Carbink 
 Stonjourner 
 Nacli 
 Glimmet 
 
 Final Reward Pool 
 If you don't hit the Legendary odds, you'll receive one of these Pokémon: 
 
 Kleavor 
 Glimmora 
 Garganacl 
 Tyrantrum 
 Aurorus 
 Carracosta 
 Archeops 
 Gigalith 
 Probopass 
 Rhyperior 
 Bastiodon 
 Cradily 
 Armaldo 
 Tyranitar 
 Tyranitar (New Form) 
 Aerodactyl 
 Kabutops 
 Omastar 
 
 Legendary Rewards 
 If you hit the Legendary odds, you'll receive one of: 
 
 Iron Thorns 
 Regirock