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Official artwork of Silcoon

#0266

Silcoon

Gen III

Cocoon Pokémon

Bug

Pokédex entry · Ruby

SILCOON tethers itself to a tree branch using silk to keep from falling. There, this POKéMON hangs quietly while it awaits evolution. It peers out of the silk cocoon through a small hole.

Height
0.6 m
Weight
10 kg
Base EXP
72
Growth
Medium
Catch rate

120/255Easy

Friendship

70/255

Base stats

HP50Attack35Defense55Speed15Sp. Def25Sp. Atk25
HP
50
Attack
35
Defense★
55
Speed
15
Sp. Def
25
Sp. Atk
25

Total 205

Low

EV yield +2 Defense

Real ranges (IV 0–31 · EV 0–252 · nature included)

MinMax
HP110157
Attack3695
Defense54117
Speed1873
Sp. Def2784
Sp. Atk2784
Total272610

About Silcoon

A white, smooth silkworm cocoon hanging from a branch. That’s what’s here, with no metaphors: silk produced by the animal itself, stretched into a capsule that holds itself against the wood and stays there for as long as necessary.

The Pokédex entries focus on one unusual detail for a cocoon — it doesn’t eat, but it does drink. It collects rainwater and dew on the silk’s surface and uses that to quench its thirst. It isn’t blind inside, either: two small holes in the fabric let it watch what’s happening outside while it waits.

And waiting is its entire purpose. It appears at level 7, when Wurmple changes form, and disappears at 10 after becoming Beautifly. Three levels of lifespan, which in a normal playthrough means fifteen minutes of gameplay.

It is 60 centimeters tall and weighs 10 kilograms, more than a ball of silk that size would suggest. Its official category is the Cocoon Pokémon, which it shares with Cascoon, the other possible outcome of the same split. Its Pokédex color is white and its body shape is spherical.

Combat analysis

×2

Weakness

FireFlyingRock
×½

Resistance

GrassFightingGround

Silcoon in depth

Shell and chrysalis

The Japanese name, カラサリス, combines 殻 (kara, shell) with the word chrysalis. English does something similar with different pieces: silk plus cocoon. Both readings point to the same thing, a silkworm cocoon, and the Pokédex color comes directly from there. There’s no transformed animal or reinterpreted object: the design is the real object, with two eyes peeking through holes and little else.

That literalness is also its limit. A cocoon cannot move, cannot attack, and cannot do anything interesting without ceasing to be a cocoon, and the design team made no attempt to disguise that. Its listed body shape is “ball”, with no limbs or appendages.

The level 7 coin toss

Wurmple is the only Pokémon whose evolution is decided directly by its personality value, the internal number every individual has from the moment it is generated. It appears on no screen, cannot be changed, and does not respond to anything the player does: not gender, nature, time of day, or the level at which it evolves. At 7, it becomes either this cocoon or the other one.

In practice, that turns the entire line into a lottery with two prizes. Anyone who wants Beautifly and gets Cascoon has to catch and breed another one. The save trick — evolving it, checking the result, and quitting without saving — works precisely because the value is static: repeating the evolution of the same individual never changes the outcome.

Two cocoons that are the same cocoon

Cascoon shares its type, 205 base stat points, Ability, category, and body shape with this Pokémon. The real difference is the destination, Beautifly versus Dustox, and the appearance. It is deliberate symmetry, and one of the few times the series has built two almost identical species whose only function is to point toward which third one comes next.

Compared with Kanto’s cocoons, the comparison neither favors nor hurts it: Metapod does the same thing, endure and raise its Defense, and both occupy three levels of the script. The difference is that Metapod enters at 7 and leaves at 10 in the same way, but with no branching behind it.

When the Pokédex entries correct themselves

The official descriptions are worth reading in sequence, because they contradict themselves. The early ones say that it grips a branch with its silk and waits while drinking rainwater. A later one goes further and admits the change in thinking: it was believed to endure hunger without consuming anything until it evolved, but now it is thought to drink the water left on the cocoon’s silk.

It’s a minor detail, but an unusual one. The Pokédex rarely admits that it was wrong; here it does so in writing, and about a Pokémon that exists for only three levels.

TCG cards

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