Kakuna, a transitional stage between Weedle and Beedrill. Kakunas remain inactive until they evolve into deadly Beedrills and hatch.
– Ash’s Pokedex
Kakuna is the counterpart to Metapod, being also based on a bug’s cocoon stage (its Japanese name is “Cocoon”), and just as useless in battle, since the only move it learns by level-up is Harden. Though it evolves at level 10 into Beedrill.
Kakuna’s name, when combined with Rattata, becomes Kakuna Rattata, What a wonderful phrase!
Stat-wise, it has Defense and HP as its highest stat, which aren’t that high at all.