Except explosion and selfdestruct
If not Explosion or Self Destruct then:
V-Create does with 180 base power.
Rollout and Ice-ball have the highest power with Stored power as second. Rollout/Ice-ball have the max power of 480 on the fifth turn, and 960 with Defense curl. Stored-power has the max power of 860 with all stats raised.
Reversal and Flail also have base 200 power when you have 1-4% HP.