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Kakuna evolves into Beedrill starting at level 10.
You need to catch a Weedle or a Kakuna.
Weedle evolves into Kakuna and Kakuna Evolves into Beedril
It is harder to train a Kakuna into a Beedril because a wild Kakuna ONLY KNOWS Harden when you catch it.
Weedle evolves into kakuna
Kakuna evolves at level 10 into Beedrill.
weedle evolves into kakuna at lvl.7 and kakuna evolves into beedrill at lvl.10