>>33180663In doubles most Pokemon want to run Protect, particularly Pokemon that will draw a lot of enemy attention. Sceptile is a frail Pokemon with a 4x weakness to one of the best and most widely distributed attacking types when it's a Mega, and next to Tapu Koko will be very visibly a combo piece, so it's reasonable to expect lots of Ice, Dragon and Fairy attacks headed its way, among others. You can use Protect to block that, but you can also use Endure to survive it while still absorbing Koko's Discharges, steadily building strength. Then you get any lost health back with a big, boosted Giga Drain on a handy target.
In theory, anyway. Mega Sceptile has been iffy at best in practice, I doubt this spicy strat will change that, but it's worth a try.