Rhyhorn is a rhino-like Pokémon that is rock hard. It has spikes on top of it to protect itself from its foes. It walks on four legs and has a horn that can be used as a drill. And it has two toes on each foot and two sharp teeth sticking out of its mouth.
Gender differences
The male's horn is longer than the female's.
Natural abilities
Rhyhorn can have the ability Rock Head or the ability Lightningrod. Rock Head prevents Rhyhorn from sustaining recoil damage. Lightningrod directs all Electric-type attacks to Rhyhorn. Its body is clad in a thick hide, and its tackles topple buildings. Unfortunately, it is not very clever, and can only run in straight lines. It is very difficult to catch in Safari Zone due to missing with Safari Balls.
Behavior
Rhyhorn can be very friendly and playful but if approached from behind they may get startled and run as they have a blindspot directly behind them, like horses do.
Its massive bones are 1000 times harder than human bones. It can easily knock a trailer flying.
Yellow
A Pokémon with a one-track mind. Once it charges, it won't stop running until it falls asleep.
Gold
It is inept at turning because of its four short legs. It can only charge and run in one direction.
Silver
It doesn't care if there is anything in its way. It just charges and destroys all obstacles.
Crystal
It can remember only one thing at a time. Once it starts rushing, it forgets why it started.
Ruby
Rhyhorn runs in a straight line, smashing everything in its path. It is not bothered even if it rushes headlong into a block of steel. This Pokémon may feel some pain from the collision the next day, however.
Sapphire
Rhyhorn's brain is very small. It is so dense, while on a run it forgets why it started running in the first place. It apparently remembers sometimes if it demolishes something.
Emerald
Once it starts running, it doesn't stop. Its tiny brain makes it so stupid that it can't remember why it started running in the first place.
FireRed
Strong, but not too bright, this Pokémon can shatter even a skyscraper with its charging tackles.
LeafGreen
Its massive bones are 1000 times harder than human bones. It can easily knock a trailer flying.
Diamond
Its body is clad in a thick hide, and its tackles topple buildings. Unfortunately, it is not smart.
Pearl
Its body is clad in a thick hide, and its tackles topple buildings. Unfortunately, it is not smart.
Platinum
Its powerful tackles can destroy anything. However, it is too slow witted to help people work.
HeartGold
It is inept at turning because of its four short legs. It can only charge and run in one direction.
SoulSilver
It doesn't care if there is anything in its way. It just charges and destroys all obstacles.
Black
Its powerful tackles can destroy anything. However, it is too slow witted to help people work.
White
Its powerful tackles can destroy anything. However, it is too slow witted to help people work.
Black 2
Its powerful tackles can destroy anything. However, it is too slow witted to help people work.
White 2
Its powerful tackles can destroy anything. However, it is too slow witted to help people work.
X
Strong, but not too bright, this Pokémon can shatter even a skyscraper with its charging Tackles.
Y
It is inept at turning because of its four short legs. It can only charge and run in one direction.
Omega Ruby
Rhyhorn runs in a straight line, smashing everything in its path. It is not bothered even if it rushes headlong into a block of steel. This Pokémon may feel some pain from the collision the next day, however.
Alpha Sapphire
Rhyhorn's brain is very small. It is so dense, while on a run it forgets why it started running in the first place. It apparently remembers sometimes if it demolishes something.
Unlike the other Rock/Ground-type Pokémon of Generation 1, Rhyhorn and Rhydon have Ground as their primary type and Rock as their secondary.
In Pokémon X/Y, you can ride a Rhyhorn in two areas: One is in Vainville Town, in the sandbox by your house, and the other is on Route 9, required to ride to Glittering Cave.
Rhyhorn's name probably comes from "rhinoceros" and "horn".