A new and strange Pokemon rom hack

[152637??]

This idea was bugging me for a long time and it hit me why hasn't anyone thought of this but I think it's probably impossible. The idea was to have all Pokemon games like Pokemon Fire Red, Pokemon Emerald and any other Pokemon game probably mystery dungeon red rescue team, but all together in one rom like sonic 3 complete did.
If you don't know what sonic 3 complete is here's the link: https://info.sonicretro.org/Sonic_3_Complete.
What I'm trying to point out is have a menu option start out first when booting on the game and being able to choose the games you want to play and have an option to be able to modify music option to any choice and patch/features options like repel system or something else. I just giving an idea away and wish I could create such a hack but I can't since I don't have a computer yet. Hopefully some day I could create this hack but in the mean time I would give some idea away.
Thanks for Read.

 

[DizzyEgg]

This idea was bugging me for a long time and it hit me why hasn't anyone thought of this but I think it's probably impossible. The idea was to have all Pokemon games like Pokemon Fire Red, Pokemon Emerald and any other Pokemon game probably mystery dungeon red rescue team, but all together in one rom like sonic 3 complete did.
If you don't know what sonic 3 complete is here's the link: https://info.sonicretro.org/Sonic_3_Complete.
What I'm trying to point out is have a menu option start out first when booting on the game and being able to choose the games you want to play and have an option to be able to modify music option to any choice and patch/features options like repel system or something else. I just giving an idea away and wish I could create such a hack but I can't since I don't have a computer yet. Hopefully some day I could create this hack but in the mean time I would give some idea away.
Thanks for Read.

Impossible. Pokemon are too complex games to fit them all in one rom. The most you could achieve is probably two regions with all Pokemon, including their cries.
So something like booting screen with FR/LG/R/S/E to choose is doable. More than that, not so much.

 

[152637??]

Yup I guess it's impossible when you pointed and I had doubt it would be possible.

 

[Skaraborne]

This idea was bugging me for a long time and it hit me why hasn't anyone thought of this but I think it's probably impossible. The idea was to have all Pokemon games like Pokemon Fire Red, Pokemon Emerald and any other Pokemon game probably mystery dungeon red rescue team, but all together in one rom like sonic 3 complete did.
If you don't know what sonic 3 complete is here's the link: https://info.sonicretro.org/Sonic_3_Complete.
What I'm trying to point out is have a menu option start out first when booting on the game and being able to choose the games you want to play and have an option to be able to modify music option to any choice and patch/features options like repel system or something else. I just giving an idea away and wish I could create such a hack but I can't since I don't have a computer yet. Hopefully some day I could create this hack but in the mean time I would give some idea away.
Thanks for Read.

As Dizzy said, this is impossible in an unexpanded ROM hack.
If you really want this to happen though, I'd recommend RPG Maker XP and Pokémon Essentials. You can learn more here.