yeah, jynx definitely needed an evo. it has such a low defense and attack. but there are two problems with making a jynx evo:
-it already has such a high sp atk, sp df and speed. if it were to evolve, than it would become just more of an overused pokemon.
-it's first design, being black, was very controversial. having to improve it's design one more step is a challenge without causing some controversy with it's design.
i think it's only fair that it should get one, but then again i'm happy with my low defense jynx. if i want to raise pokemon real quickly, i just battle the biker dudes with high level weezings that know explosion, and switch them out with jynx XD.