| Pokedex Entries: |
| Red | Capable of swimming backwards by rapidly flapping its wing-like pectoral fins and stout tail. |
| Blue |
| Yellow | Touching the back fin causes numbness. It hooks its tail to coral to stay in place while sleeping. |
| Gold | An examination of its cells revealed the presence of a gene not found in HORSEA. It became a hot topic. |
| Silver | Its fin-tips leak poison. Its fins and bones are highly valued as ingredients in herbal medicine. |
| Crystal | The male raises the young. If it is approached, it uses its toxic spikes to fend off the intruder. |
| Ruby | SEADRA sleeps after wriggling itself between the branches of coral. Those trying to harvest coral are occasionally stung by this POKéMON's poison barbs if they fail to notice it. |
| Sapphire | SEADRA generates whirlpools by spinning its body. The whirlpools are strong enough to swallow even fishing boats. This POKéMON weakens prey with these currents, then swallows it whole. |
| Emerald | The poisonous barbs all over its body are highly valued as ingredients for making traditional herbal medicine. It shows no mercy to anything approaching its nest. |
| FireRed | Its body bristles with sharp spikes. Carelessly trying to touch it could cause fainting from the spikes. |
| LeafGreen | Capable of swimming backwards by rapidly flapping its wing-like pectoral fins and stout tail. |
| Diamond | Its spines provide protection. Its fins and bones are prized as traditional medicine ingredients. |
| Pearl |
| Platinum | Its spines provide protection. Its fins and bones are prized as traditional medicine ingredients. |
| Stadium 1 | A clever POKéMON that can swim backwards while facing forward. Fainting may result from a jab of its sharp spikes. |
| Stadium 2 | An examination of its cells revealed the presence of a gene not found in HORSEA. It became a hot topic. |
