Neutrino was not an official pokemon at the time of Pokemon Yellow. There is still no official pokemon species named "neutrino".
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Spearow evolves at level 20 in Pokemon Yellow.
Caterpie can evolve into metapod starting at level 7. The evolution conditions for caterpie are not different in Pokemon Yellow from other pokemon games.
At level 20.
no level you have to trade dude
16.