Poison Barb
Mareanie in depth
A starfish that eats coral
The main reference is the crown-of-thorns starfish, an animal covered in spines that damages reefs by feeding on coral. Mareanie turns that idea into a small creature with a crown of ten tentacles and a central spike. The Pokédex entries carry that behaviour over directly: it hunts Corsola, eats its branches and clashes with those who make use of naturally detached coral. Its regeneration also comes from the biology of many echinoderms, although here it is limited by one clear exception: its head does not grow back.
The English name combines marine with meanie, meaning “mean” or “malicious”. The Japanese name Hidoide combines hidoi, “cruel”, with hitode, “starfish”. The idea is also reflected in its category, the Brutal Star Pokémon, and explains why the design does not aim for a friendly appearance despite its small size.
A line designed to toughen up
Mareanie starts with 62 Defense and 52 Special Defense, enough to take some hits while it spreads status or restores HP. Its evolution into Toxapex strengthens that role much further. For that reason, if it is kept unevolved, it is best treated as a support piece rather than an incomplete attacker.
In a normal playthrough, its best moments come when the opponent needs to switch or when a status condition is already on the field. Toxic Spikes wears down Pokémon that come in, Recover means a defensive switch-in does not have to be its last, and Haze stops opponents trying to stack boosts. Acid Spray can lower the target’s Special Defense, but its 43 Special Attack still leaves its damage limited.
From Alola to the coasts of Paldea
Mareanie debuted in Alola and later appeared in Galar and Paldea. Its Pokédex entries gradually expanded the picture of the species. At first, they focused on hunting prey and the coral of Corsola; later, they described the effects of its sting, its regeneration and its habit of eating the broken spines of Pincurchin, even though this causes it to receive electric shocks. Galarian specimens also introduced a behavioural difference: they had not yet discovered the taste of Corsola’s branches.
Its availability was not uniform across games either. It reached later regions, but was not present in every release during that period, and its movepool was adapted to each generation’s systems. In the current games, it retains the combination of Recover, Toxic Spikes, Toxic and Haze, along with moves such as Surf, Ice Beam and Sludge Bomb.
How to use it without asking too much of it
Bring it in against attacks it resists, set up Toxic Spikes if the opponent is likely to switch and then switch out to activate Regenerator. It should not stay in against Ground-, Electric- or Psychic-type threats, nor should it try to win drawn-out exchanges against powerful Pokémon. Merciless can turn a poisoned opponent into an easier target, but Toxic or Toxic Spikes needs to have done its work first.
Its catch rate of 190 fits an accessible species during the adventure. It also helps that it is found in coastal areas, where its behaviour around coral makes it clear that it is not a passive starfish: it looks for food, stings first and regenerates afterwards.