>>54489559Gonna assume you mean the legends that arent event exclusive, and can only be attained once per save, or something similar. Fire, Ice, Electric, Flying, Psychic are all taken out in Gen 1.
Gen 2 doesn't add any new except for Suicune's Water (celebi is the second mythical i swear)
Ground, Steel, Rock, and Dragon are all that I can come up with that Hoenn thrust upon us
Sinnoh brings Ghost, and Normal is a technicality since yes, you don't need events to get Gigas but you do need the gen 3 games so lets count it, but I dont fault you for madge
Gen 5 might bring something besides Fighting, but unless I count more repeat types, the mythicals are quite the dent.
Kalos brings Dark and Fairy
Alola is where we would really split hairs, if the UB weren't able to be attained multiple times, so no new types added.
Galar has Poison in eternatus.
Paldea? Same as the UB, since while Slither Wing is a bug, its also actually common in A0. As for their legends, perhaps the Indigo Disk will bring a bug.
Perhaps you're right, perhaps im being pedantic and we couldve included Genesect, but since it requires an event in its home gen, we're calling it a mythical.