| Pokedex Entries: |
| Red | The Shellder that is latched onto Slowpoke's tail is said to feed on the host's left over scraps. |
| Blue |
| Yellow | Lives lazily by the sea. If the Shellder on its tail comes off, it becomes a Slowpoke again. |
| Gold | If the tail-biting SHELLDER is thrown off in a harsh battle, it reverts to being an ordinary SLOWPOKE. |
| Silver | Naturally dull to begin with, it lost its ability to feel pain due to SHELLDER's seeping poison. |
| Crystal | An attached SHELLDER won't let go because of the tasty flavor that oozes out of its tail. |
| Ruby | SLOWBRO's tail has a SHELLDER firmly attached with a bite. As a result, the tail can't be used for fishing anymore. This causes SLOWBRO to grudgingly swim and catch prey instead. |
| Sapphire |
| Emerald | Its tail has a SHELLDER firmly attached with a bite. As a result, the tail can't be used for fishing anymore. This forces it to reluctantly swim and catch prey. |
| FireRed | When a SLOWPOKE went hunting in the sea, its tail was bitten by a SHELLDER. That made it evolve into SLOWBRO. |
| LeafGreen | The Shellder that is latched onto Slowpoke's tail is said to feed on the host's left over scraps. |
| Diamond | Though usually dim witted, it seems to become inspired if the SHELLDER on its tail bites down. |
| Pearl |
| Platinum | Though usually dim witted, it seems to become inspired if the SHELLDER on its tail bites down. |
| Stadium 1 | If its tail is bitten by a SHELLDER, SLOWPOKE evolves into SLOWBRO. The SHELLDER seems to like its crunchy tail. |
| Stadium 2 | If the tail-biting SHELLDER is thrown off in a harsh battle, it reverts to being an ordinary SLOWPOKE. |
| TCG | Dark Slowbro: It loves nothing better than to be left alone, and so sometimes ends up being manipulated by unscrupulous people. |
| Light Slowbro: If the Shellder attached to its tail becomes separated, this Pokémon reverts to a normal Slowpoke. |
