Question

There are so many.
Persian
Scizor
Rattata
Raticate
Meganiam
Ursarang
Gligar
Sneasal

Those are just Gen 1-2... there are like 10 more...

Answer 1

This a list of ALL Pokemon with gender differences. They have pictures of both genders and a description on the differences.

http://bulbapedia.bulbagarden.net/wiki/Gender_differences

Comments

for persian, i was thinking of the shiny and regular form my bad XD

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And for normal Female Sneasel and normal Male Sneasel, the difference is their appearance.

Answer 2

Actually female and male Persian don't have gender difference

Rattata and Raticate: Female has smaller whiskers
Meganium: Male has larger antennae
Scizor: Female has larger abdomen
Ursaring: Female has longer shoulder hair
Sneasel: Female has a shorter feather
Gligar: Female has smaller stinger

From: http://bulbapedia.bulbagarden.net/wiki/Gender_differences