These are the Pokemon available in LeafGreen but absent in FireRed. Click on the picture of a Pokemon and you will be directed to the LocationDex so you can know exactly where to find it.
#27 Sandshrew
#28 Sandslash
#37 Vulpix
#38 Ninetails
#69 Bellsprout
#70 Weepinbell
#71 Victreebell
#79 Slowpoke
#80 Slowbro
#199 Slowking
#120 Staryu
#121 Starmie
#126 Magmar
#240 Magby
#127 Pinsir
#298 Azuril
#183 Marill
#184 Azumaril
#200 Misdreavus
#215 Sneasel
#223 Remoraid
#224 Octillery
#226 Mantine
#386 Deoxys (Defense Forme)
