| Pokedex Entries: |
| Red | When it locks eyes with the enemy, it will use a mix of Psi moves such as Hypnosis and Confusion. |
| Blue |
| Yellow | Avoid eye contact if you come across one. It will try to put you to sleep by using its pendulum. |
| Gold | When it is very hungry, it puts humans it meets to sleep, then it feasts on their dreams. |
| Silver | Always holding a pendulum that it rocks at a steady rhythm, it causes drowsiness in anyone nearby. |
| Crystal | The longer it swings its pendulum, the longer the effects of its hypnosis last. |
| Ruby | HYPNO holds a pendulum in its hand. The arcing movement and glitter of the pendulum lull the foe into a deep state of hypnosis. While this POKéMON searches for prey, it polishes the pendulum. |
| Sapphire |
| Emerald | The arcing movement and glitter of the pendulum in a HYPNO's hand lull the foe into deep hypnosis. While searching for prey, it polishes the pendulum. |
| FireRed | It carries a pendulum-like device. There once was an incident in which it took away a child it hypnotized. |
| LeafGreen | When it locks eyes with the enemy, it will use a mix of Psi moves such as Hypnosis and Confusion. |
| Diamond | Seeing its swinging pendulum can induce sleep in three seconds, even in someone who just woke up. |
| Pearl |
| Stadium 1 | If you lock eyes with it, it will try to hypnotize you. It is best to close your eyes quickly before you get hypnotized. |
| Stadium 2 | When it is very hungry, it puts humans it meets to sleep, then it feasts on their dreams. |
| TCG | Dark Hypno: Carries a pendulum with it always. Sometimes appears near less-traveled roads and schools at dusk. |
