mew and mewtow
You can get rare candies in pokemon yellow
not very
It bumps your Pokemon up a level
walmart i guess
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The rare, non-legendary Pokemon in Generation I (Red, Blue, Yellow, Green) are:PikachuRaichuClefairyClefableVulpixNinetalesMeowthPersianFarfetch'dExeggcuteHitmonleeHitmonchanLickitungRhyhornRhydonChanseyTangelaKangaskhanStaryuMr. MimeScytherJynxElectabuzzMagmarPinsirTaurosLaprasDittoEeveeVaporeonJolteonFlareonPorygonOmanyteOmastarKabutoKabutopsAerodactylSnorlaxDratiniDragonairDragonite
buy it at the rare Pokemon store
in the cerulean cave but it's rare
You Haz to Capture Teh Mudkipz.
Slather one of the yellow trees with honey. They are very rare.
they don't have codes in old games
Surf along Route 6, but they are quite rare...