Help with trainer rematches

[Seedonator]

Okay so how do I make it so that when you battle a trainer you can rematch them by talking to them again. Yes I know I can use a self switch but I want it so that you have to reload the map and then you can re battle them that way you can't just farm Exp. points, EV's and IV's super fast.

 

[LyonSyonII]

You can activate a Global Switch when reloading the map (at the exit teleport) if the Switch is activated you can battle, when is deactivated you can't. Just disable the Switch when you win.

 

[Seedonator]

I thought of that already but there's 2 problems.
1) This won't work for map connections.
2) If I have multiple trainers per map then I can only battle 1 of them before I need to reset the map again.

I know it's possible to make switches for each individual trainer and put a row of player touch events on the map connection borders but that's really really inconvenient and I'm sure there's a much easier way to do that with scripts.