Ditto, Wobbufet ,magikarp, tynamo, unown, caterpie, metapod, weedle , kakuna (credit to technoblastboy for the last four), tynamo, kriketot, wurmple, silcoon, cascoon, beldum, wynaut, combee, and burmy. I believe this is all of them.
Yeah unown doesn't learn toxic, also ditto can't learn unless it transforms, wobufett and magikarp do not know. Caterpie, Metapod, Weedle, Kakuna.
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