So basically you switch as usual, you just can "switch" to the new pre-evolution as well. This sounds like a good option IMO. A good balance between sweeps being possible and mons not just going down 123.Yes.
After thinking about it for a while, I have decided that You are able to switch after you faint, but you have the option to stay in and use your devolved form. If you use your devolved form, you will not continue the attack you are using.
:)
Bisharp and Gothitelle are pleased by your strategy.Dugtrio could be cool on offensive teams because it can trap stuff and memento, and if holding a sash, possibly come back and do it again as a diglett, giving you a lot of chances to set up. Hell, you don't even require a sash; life orb could work, since diglett has pretty passable speed. Really cool meta, i'd love to see this get coded!
edit: whimsicott could actually work better for this with access to stun spore and prankster, and it would also work twice
Volcarona´s Special Attack goes from 135 to 50 if it devolves. Larvesta has a higher attack stat than Volcarona.I wish I could code ;~;
Also, S/Os to anybody who bring Venomoth to this metagame, only to find out that Venonat is a Physical Attacker. So, yeah, offensive Pokemon like that are much worse (Ex. Venomoth line, CM Slowbro line, anything else I'm forgetting)