All New Pokemon between each gym. Is there a name for this? Doesn't matter. Do it!

Monotype gets kind of boring. Nuzlocke is too limiting without full-time sweating. Just conventional play is great but feels like you lock in your team.

You're a Pokemon master. Or want to be. Why not train like it? You beat a gym? Congrats! Why not try out some new Pokemon and learn more about the world? Maybe you'll even find some new favorite!

Sure there will be some grinding slog, but I think that sounds better than constantly outleveling everyone with your starter and fave five.

You can have extra rules if you want. Maybe you have to have the last gym's TM. Maybe type match the last gym entirely. Or ONLY new mons from the route you just opened. Idk. Get out of your comfort zone!