That I can recall, I've found eight!
In order, to the best of my recollection...
Zigzagoon♀, in Ruby version.
Taillow♂, in Ruby version.
Wurmple (Dustox)♀, in Emerald version.
Totodile♂, in SoulSilver version.*
Geodude♂, in Pearl version.*
Tympole♀, in White version.
Sandile♀, in White version...