I apologize for not mentioning this sooner, but can someone please give me a list of all of Byron & Giovanni's Pokemon across all media?
I decided to just count fathers instead of including grandfathers as well, since 5 father characters (Byron, Giovanni, Birch, Norman, and Koga) gives us plenty of Pokemon already.
Byron:
- Bonzor/Bronzong
- Onix/Steelix
- Shieldon/Bastiodon
- Magnemite/Magneton/Magnezone
- Skarmory
- Aron/Lairon/Aggron
- Pineco/Forretress
- Drillbur/Excadrill
Giovanni:
- Onix/Steelix
- Kangaskhan
- Rhyhorn/Rhydon/Rhyperior
- Nidoran♂/Nidorino/Nidoking
- Nidoran♀/Nidorina/Nidoqueen
- Duglett/Dugtrio
- Meowth/Persian
- Murkrow/Honchkrow
- Geodude/Graveler/Golem
- Cubone/Marowak
- Sandshrew/Sandslash
- Gible/Gabite/Garchomp
- Gligar/Gliscor
- Hippopotas/Hippowdon
- Sandile/Krokorok/Krookodile
- Tauros
- Gastly/Haunter/Gengar
- Moltres
To not complicate things: Onix/Steelix is shared by Byron and Giovanni; Tauros is shared by Giovanni and Norman; Kangaskhan is shared by Giovanni and Norman; Pineco/Forretress is shared by Byron and Koga; Gligar/Gliscor is shared by Giovanni and Koga; both Nidoran families are shared by Giovanni and Koga.
There are also a few mistakes in the main post: Exploud is written 'Explous'; some families are not completed in the lists (absence of Slaking in the Slakoth family, for instance).
I corrected them for you:
Norman:
- Slakoth/Vigoroth/Slaking
- Happiny/Chansey/Blissey
- Starly/Staravia/Staraptor
- Whismur/Loudred/Exploud
- Deerling/Sawsbuck
Koga:
- Tangela/Tangrowth
- Gligar/Gliscor
- Scyther/Scizor
- Nidoran♂/Nidorino/Nidoking
- Nidoran♀/Nidorina/Nidoqueen
Birch:
- Treecko/Grovyle/Sceptile
- Mudkip/Marshtomp/Swampert
- Torchic/Combusken/Blaziken
I'm sorry if my nitpick is bothering, I meant no offense! I just thought it'd be cleaner that way. :3