Ferroseed

It looks like a seed covered in leaves, but its body is a metallic sphere that clings to cave walls. Ferroseed belongs to the Thorn Seed Pokémon category and combines a Steel shell with green spikes that it shoots when it senses danger. It does not seek prolonged fights: it fires its spikes to throw off the attacker, takes advantage of the opening, and rolls away.

Moss-covered cave walls are its preferred habitat. It hangs from the ceiling and absorbs the iron-bearing components of rocks, while the moss’s enzymes encourage the growth of large, sturdy spikes. Aiming well does not come naturally to it; it needs plenty of practice before it can hit with precision.

Its body measures 0.6 m and weighs 18.8 kg, a combination that explains why it can roll away to escape, but is also difficult to move once attached to a wall. It is the first stage of its evolutionary line: when it reaches level 40, it evolves into Ferrothorn, which retains the Grass and Steel types and develops a much bulkier silhouette.

Ferroseed is not much of an attacker. Its HP is 44, its Attack 50, and its Special Attack 24. Its Defense, on the other hand, reaches 91 and its Special Defense 86, while its Speed remains at 10. This spread points it towards enduring hits, setting hazards, and wearing foes down rather than winning exchanges through direct damage.

Iron Barbs defines much of its utility: it damages foes that make contact. Spikes and Stealth Rock punish switches, while Thunder Wave lets it slow down opponents that switch in too confidently. Leech Seed, available as an Egg Move, provides residual damage and indirect recovery. When it needs to attack, Iron Head is a reliable option; Gyro Ball takes advantage of its extremely low Speed against fast foes, although it becomes less effective when the target is slow as well.

Grass and Steel give it many resistances and an immunity to Poison, making it easier to switch in on Water-, Grass-, or Electric-type attacks. The problem is serious: Fire deals massive damage to it, and Fighting is also a major threat. It also lacks immediate recovery, struggles against Taunt, and puts very little pressure on foes that do not care about its hazards.

Its competitive use makes the most sense in Little Cup, where the protective mineral Eviolite reinforces its defenses even further. There, it works as a support wall and a source of residual damage. Outside that environment, Ferrothorn follows the same idea with better stats and a stronger presence.

Ferroseed belongs to the Grass and Mineral Egg Groups, so it shares compatibility with species from both groups. The gender ratio is 50 % male and 50 % female. Its Eggs take 20 cycles to hatch, equivalent to approximately 5355 steps using the series’ usual conversion.

Its notable Egg Moves include Leech Seed, which makes up for its lack of direct recovery; Knock Off, useful for removing items; Gravity, which can alter the conditions on the field; and Toxic, which strengthens its wearing-down strategy. Acid Spray adds a special Poison-type option, although its base Special Attack of 24 is hardly a reason to build around that damage.

The evolution method is straightforward: Ferroseed evolves into Ferrothorn when it reaches level 40. In caves with moss-covered walls, it finds the minerals and enzymes it needs to develop its spikes. Its catch rate is 255, so catching it is trivial compared with species that are difficult to catch. It may also be found holding a Sticky Barb as a wild item.