Sure you can. Come up with some reason for Power Spots to have developed beyond the borders of Galar, and suddenly Dynamax is perfectly capable of occurring there. That’s the only roadblock at play here.
G-Max Melmetal’s Pokédex entry already implies the plausibility of this scenario, anyway.
I remember one plausible explanation I came up with for Sinnoh to have Max Raid Battles is for Team Galactic's science and/or engineering teams to get ahold of Galar Particles, either smuggled in or synthesized, and create an artificial Power Spot in this way. One could say that it's not perfect so there may be restrictions, and they've only ever made one, but that alone could open the floodgates.
We've had precedent of these things in the past. The fact that a Mega Stone exists for Mewtwo, an artificially created Pokémon, implies the Mega Stone was also artificially created, and thus people are able to make their own. While not a generational gimmick, Type: Null, and by extension Silvally, were specific to Alola when they debuted because they were created within Aether Foundation, but the recipe to create them got leaked to other regions, and someone in Galar was able to create a Type: Null, with further possibilities down the line of them showing up in other regions. Hence, the possibilities are always open for Dynamax/Gigantamax to pervade to other regions even if they say they're specific to Galar.
You can look to the real world for these same kinds of people, although not necessarily evil or questionable. Artificial rubies, diamonds, and sapphires have since been made such that as long as you don't care about their place of origin, you don't even have to mine them anymore. If you have a smartphone or a touch screen tablet, chances are your screen is made of artificial sapphire.
Nintendo is really missing out by not putting a GBA and DS emulator on the Switch and then releasing slightly updated Switch virtual console editions of Gens 1-4 with support for Home.
Nintendo can put emulators of the GBA and DS. Putting Pokémon games on them, however, is another matter because Nintendo doesn't have complete control over the Pokémon franchise. They need to ask permission from The Pokémon Company first. (This is why some Nintendo compilations, like
Nintendo Land and the Nintendo version of Monopoly, don't have any Pokémon characters in them, not even Pikachu. The rights are different and more complicated.)
Interesting, and in fact I believe the games will actually be 10.5GB, so this could be very true.
The Nintendo eShop estimates them to be roughly this size. It was of concern to me because I currently only have about 13 gigabytes left in my MicroSD card I have in there. I bought a larger one since, but I need to clear up space on my computer to transfer the information because my computer doesn't have much free space left either...
Im getting them because my dog chewed up my platinum cartridge and im too lazy to look for my pearl version xD. Plus I don't want to start a new file on either of them anyways.
Kind of hard to start a new file on a chewed-up cartridge.
Then again, there was that
Tetris cartridge that a soldier in the Gulf War lost out in the desert, got recovered many years later, and continues to work. On the hardware side, all of those photos of Wii Remotes embedded into TVs and walls show the large items destroyed but the Wii Remotes perfectly intact. Joy-con joysticks aside, Nintendo still rivals Tonka in toughness.