How to Evolve Solosis

Solosis reaches its first evolution, Duosion, at level 32. Duosion then evolves into Reuniclus at level 41. This is a completely linear leveling path. You do not need to use evolutionary stones, trade the Pokémon, or meet specific friendship thresholds.

Because it belongs to the Fluctuating experience group, Solosis levels up quickly in its early stages but requires a massive amount of EXP to bridge the gap from level 32 to 41. Its base 20 Speed makes it a liability in early-game battles. Keep it in the back of your party with an Exp. Share active, or rely on EXP Candies M and L obtained from Tera Raids to bypass the grind safely.

Once it evolves into Duosion, its Special Attack jumps to a massive base 125. This allows Duosion to function as a glass cannon during mid-game progression, capable of securing OHKOs with Psychic against unresisted targets. However, its base 50 Defense means it will still easily fall to physical attackers before reaching level 41.

Evolving Solosis all the way to Reuniclus yields a highly specialized, bulky Special Sweeper. Reuniclus earns a solid 7.5/10 in competitive formats specifically because of its access to the Magic Guard ability. Magic Guard grants total immunity to indirect damage.

This means Reuniclus takes zero damage from Toxic, Will-O-Wisp burns, Stealth Rock, Spikes, Sandstorm, and Life Orb recoil. This unique trait turns it into an exceptional stallbreaker. You can equip a Life Orb to gain a free 30% damage boost on all attacks without suffering the standard 10% HP penalty per hit.

Despite these massive advantages, Reuniclus is held back by its base 30 Speed. Outside of Trick Room, it will almost always move last. It requires precise team support to function at its peak, and its base 75 Defense leaves it vulnerable to strong physical wallbreakers before it can set up.

Reuniclus excels in two primary competitive roles. The first is a dedicated Trick Room Sweeper. By running a Quiet Nature with 0 Speed IVs, Reuniclus becomes one of the fastest threats on the field under Trick Room conditions. It utilizes Life Orb-boosted Psychic and Focus Blast to shatter defensive cores.

The second dominant role is the bulky Calm Mind sweeper. This set maximizes HP and Defense EVs with a Bold nature. By chaining Calm Mind alongside Recover, Reuniclus boosts its Special Attack and Special Defense simultaneously. Players often slot Acid Armor into this build to patch up its physical Defense, making it virtually unkillable by raw damage.

• Trick Room Build: Psychic, Focus Blast, Shadow Ball, Trick Room (Life Orb).
• Calm Mind Build: Calm Mind, Recover, Stored Power, Acid Armor (Leftovers).

Because Magic Guard prevents Toxic from putting it on a timer, opposing stall teams frequently lack the tools to break through a fully set-up Reuniclus. Stored Power pairs perfectly with Calm Mind and Acid Armor, scaling in base power for every stat boost acquired.

While Magic Guard is the standard choice, Solosis and its evolutions possess Regenerator as a Hidden Ability. Regenerator restores 33% of the Pokémon's maximum HP every time it switches out. This fundamentally changes how Reuniclus is played, shifting it from a setup sweeper to a bulky pivot.

A Regenerator Reuniclus typically runs an Assault Vest to bolster its base 85 Special Defense. It switches into special attacks, fires off a strong Psychic or Knock Off, and switches out to heal the damage taken. This set relies on Future Sight to pressure opponents, forcing them to take massive delayed damage while Reuniclus safely retreats.

However, choosing Regenerator means forfeiting the immunity to hazards and status conditions. If your team lacks reliable hazard removal (like Rapid Spin or Defog), Stealth Rock and Spikes will severely cut into the HP recovered by Regenerator, making this ability highly team-dependent.

Solosis is a perfect fit for players building dedicated Trick Room teams or those needing a reliable, self-sustaining win condition against stall archetypes. Its massive base 125 Special Attack and reliable recovery make it a staple for slow, methodical playstyles.

Conversely, avoid evolving Solosis if you run fast Hyper Offense teams. Its heavy reliance on setup turns completely breaks the momentum of fast-paced squads. Reuniclus is also a poor choice if your local metagame is saturated with strong Dark and Ghost-types.

Threats like Kingambit, Gholdengo, and Dragapult easily outspeed and OHKO Reuniclus before it can establish a Trick Room or stack Calm Mind boosts. Knock Off is particularly devastating, as it removes the crucial Life Orb or Leftovers while dealing massive super-effective damage to Reuniclus's vulnerable physical side.