| Pokedex Entries: |
| Gold | It has incredible intellect and intuition. Whatever the situation, it remains calm and collected. |
| Silver | When its head was bitten, toxins entered SLOWPOKE's head and unlocked an extraordinary power. |
| Crystal | Every time it yawns, SHELLDER injects more poison into it. The poison makes it more intelligent. |
| Ruby | SLOWKING undertakes research every day in an effort to solve the mysteries of the world. However, this POKéMON apparently forgets everything it has learned if the SHELLDER on its head comes off. |
| Sapphire |
| Emerald | It undertakes research every day to solve the mysteries of the world. However, it apparently forgets everything if the SHELLDER on its head comes off. |
| FireRed | When its head was bitten, toxins entered SLOWPOKE's head and unlocked an extraordinary power. |
| LeafGreen | It has incredible intellect and intuition. Whatever the situation, it remains calm and collected. |
| Diamond | Being bitten by SHELLDER gave it intelligence comparable to that of award-winning scientists. |
| Pearl |
| Platinum | Being bitten by SHELLDER gave it intelligence comparable to that of award-winning scientists. |
| Stadium 2 | It has incredible intellect and intuition. Whatever the situation, it remains calm and collected. |
| TCG | Dark Slowking: Each time it yawns, the Shellder on its head releases an enzyme that makes it grow even smarter. |
| Slowking: Its nonchalant reaction to everything somehow gives this Pokémon an imposing presence. |
