Given the board, I'm going to assume this only applies to Generation III and prior.
First Gen:
Machop/Ghastly/Abra Families (Trading to evolve is a big no-no for me)
Porygon (So many coins...)
Chansey (Rare, but I've never liked its design)
Jynx (Again, ugly)
Second Gen:
Politoed, Kingdra, Porygon-2, Steelix (Trading)
Shuckle (Slow and weak, no real need for a tank outside of competitive)
Third Gen:
Pelipper (Weaker Gyarados, never saw a need for one)
Mightyena (By this point I realized that a physical Dark type would surely fail, before the phys/spec split)
And to all gens, I have never raised a Legendary.