It's actually going to change because mainly ExtremeSpeed Pinsir but also other stuff such as Mega Manectric. From now, Arceus is going to give and take(lol it's banned) moves only from pure Normal types. Not that most types will be hurt as there is at least one monotyped Pokémon with crazy movepool for every type except Ghost.
Well, now that I realize it, this metagame really sucks for Ghost, as dual typed ones have all unique typing except Sableye-Spiritomb and Trevenant-Gourgeist, the latter of which pretty much have the same movepool, while monotyped ones have all pretty barren movepool, and if it weren't enough, they are mostly mediocre/bad Pokémon.
Mega Evolutions, Castform formes and Darmanitan-Zen will work only as one-sided share, they can give moves, but not take new ones, they are going to rely of the type they have when they enter the field for the first time. This means, for example, that Gyarados can't take any move from Crawdaunt, but it can do from Mantine. However, Crawdaunt can take any move it wants from Gyarados. A Rotom-Appliance can't take the movepool from another Appliance, since this is also impossible in-game, as Hydro Pump etc. get deleted when turning back to normal Rotom. They can only take moves from normal Rotom other than their respective type, aka nothing since Electric-Ghost is an unique typing. The Immortal was iffy about this one so I would like to hear more opinions about it.
OP edited in order to make rules more clear and name changed into Type bridge. Thanks AWailOfATail.
