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
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.
The target cannot choose its last move for 2-5 turns. Disable only works on one move at a time and fails if the target has not yet used a move or if its move has run out of PP. The target does nothing if it is about to use a move that becomes disabled.
Dragon / 
Water 1