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Kakuna is a Bug/Poison-type Pokémon introduced in Generation I. Known as the Cocoon Pokémon, it is the evolved form of Weedle and the pre-evolved form of Beedrill. Kakuna is almost completely immobile, capable of only slight movements while it clings to tree bark. This immobility is due to its ongoing metamorphosis inside its hard shell as it prepares for its final evolution.

Despite its apparent vulnerability, Kakuna has developed defensive mechanisms. When endangered, it can extend poisonous barbs to deter predators. The shell of a Kakuna becomes hot to the touch, indicating the intense activity occurring within as it approaches evolution. Kakuna typically hides from predators under leaves and in the nooks of tree branches while awaiting evolution.

Pokédex Data

• Category: Cocoon Pokémon
• Height: 0.6 m (2'00")
• Weight: 10.0 kg (22.0 lbs)
• Ability: Shed Skin

Breeding

• Egg Group: Bug
• Gender Ratio: 50% male, 50% female
• Egg Cycles: 15 (3,599–3,855 steps)

Pokédex Entries Across Versions

• Red/Blue: "Almost incapable of moving, this Pokémon can only harden its shell to protect itself from predators."
• Yellow: "Able to move only slightly. When endangered, it may stick out its stinger and poison its enemy."
• Gold: "Although it is a cocoon, it can move a little. It can extend its poison barb if it is attacked."
• Ruby/Sapphire: "Kakuna remains virtually immobile as it clings to a tree. However, on the inside, it is extremely busy as it prepares for its coming evolution. This is evident from how hot the shell becomes to the touch."

Evolutions

Weedle (Level 7) → Kakuna (Level 10) → Beedrill

Habits and Additions Across Generations

In Generation 1, Kakuna had a base Special stat of 25. Its base experience yield was changed from 71 to 72 in Generation 5. The base Friendship value was adjusted from 70 to 50 in Generation 8. These changes reflect the ongoing refinement of Pokémon game mechanics and balancing across different generations.