Fortunately there is a fan run project that's working on recreating the online services for these consoles/games, in the same way that Wiimmfi has gotten the DS and Wii's multiplayer functionality up and running. See the Pretendo project here:
It's not exactly feature perfect yet, but 2024 gives them time to fix up many of the features they haven't gotten working, and hopefully expand support to more games.
https://pretendo.network/
It's not exactly feature perfect yet, but 2024 gives them time to fix up many of the features they haven't gotten working, and hopefully expand support to more games.