There is a Pokemon fan Project that let you fight with a Pokemon team in a rogue lite format, so it get harder and harder and you need to find a team that keep up with the level and manage you money/ressouces as long as possible. I think it makes a lot of fun and maybe survive since it’s a non profit project. Try it out if you want.
Maybe it won’t last forever, but usualy the Pokemon company goes against games that make profit. I know a lot projekt that are online for years.
Yes it required a lot knowledge and luck as well, got whipes by a Latias
git clone, everybody.
Also somehow pokewilds is still up so… maybe there is hope