The most compatible Pokemon for a separate turn-by-turn paste! (Sorry, Snorlax2)

Strategy is based on the fact that Rest SHOULD be nearly guaranteed at <60% HP when you outspeed: https://github.com/pret/pokefirered/blob/master/data/battle_ai_scripts.s

1: Return + Acid Armor (57%)
2: DD + Rest (100%)
3: Return + Acid Armor (67%)

IF REST:
4: Return + Rest (100%)
5: Return + asleep (78%)
6: Return + asleep (56%)
7: DD + Rest (100%)
8: Return + asleep (72%)
9: Return + asleep (44%)
10: DD + Rest (100%)
11: Return + asleep (62%)
12: Return + asleep (24%)
13: Return

IF ICE BEAM:
4: Return + Ice Beam (45%)
5: DD + Rest (100%)
6: Return + asleep (72%)
7: Return + asleep (44%)
8: DD + Rest (100%)
9: Return + asleep (62%)
10: Return + asleep (24%)
11: Return