I'm here to respect everyone's wishes, of course. But why would you want this? This is suggesting the developers to implement strong and loads of network security features (for battles, trades) just to have you break their game? I'm very sorry but I don't see why this would bring any fun in the game at all. First of all, you want options to cheat (legend breeds, movepool abuse)? I'm not even going to explain the 'nope' here.
Second, and more discussion worthy, this rule/cheat mode you suggest would result in a player only being able to communicate with another player when he/she is playing by the same rule/cheatset. In other words, the more rules and cheats the more possible combinations for sets, thus the LESS chance of compatibility with other players. Another nope in my opinion.
Seriously bro, you're asking to make the game like the emulator ROM's just so you can breed legendary's and mess around with the game? Why not just download an emulator and the ROM and go mess with the game?
And last time I checked, Pokèmon doesn't apply DLC, so I think you can forget about that too. And if they would, I'd rather have them give us items, pokes, moves and regions or sidequests as DLC. Not some extra options to add to my hacked/cheat run which I can't use for tourny's, trades or anything.
Sorry man, like I said I respect everyone's wishes. But this is actually a bad idea, completely. Or I am missing something here.
I am already sick of all the hacked, shiny, 6V pokemon people use online. Suggesting that you want options like that within the game tells me you don't like this game. Go play something you actually want to do. Don't suggest to rediculously and wildly change mechanics/options just because you're too lazy to breed something good.