>>42510389[Questionable Inheritance]
When a pokemon gets KO'd, half of all it's individual stats are added onto the following pokemon, but if you willingly sacrifice it (with a 5th/seperate move option that works like healing wish), all of them transfer, but with the trade off that any move against you is now calculated to be 4x effective.
[Endurance Round]
The battle begins with Toxic Spikes (that ignore all immunities, poison type's ability to remove it, as well as spinning/defog) already on the field, and every other turn, a new hazard pops up, sneaky pebbles, spikes, and a new, specific damaging weather that hurts any type. Last one standing wins, whether you try stalling it out, or going hyper offense.