Gravattack creates a black hole
Feat happens in Let's Do the Time War Again at 13:00
Using the same method Darkanine used in his Power Ranger calc. Window - 117.02 px or 1.5 meters
Radius of Black Hole - 456.07 px or 1.95 meters

This gives me 6.599310e-4 solar masses
GBE of the Sun = 6.87e+41 Joules
6.87e+41 * 6.599310e-4 = 4.53372597e+38 Joules or 108.36 Ninatons (Dwarf Star level)
Malgax punches Diamondhead to the Moon
Feat happens in Malgax Attacks at 8:15
Grandpa Max - 495.17 px or 2 meters
Diamondhead - 544.95 px or 2.2 meters
Using the square cube law.
Average human height - 1.7 meters
Average human volume - 0.07 m^3
V2 = 0.07*(2.2/1.7) = 0.091 m^3
Diamondhead is either made out of diamonds or taydenite.
Density of diamond - 3510 kg/m^3
Diamondhead's weight (Low-End) - 319.41 kg
Since Taydenite is said to be the hardest material in the universe, I will use the density of Osmium.
Density of osmium - 22,590 kg/m^3
Diamondhead's weight (Mid-End) - 2055.69 kg
Using the density of neutronium as a high-end.
Density of neutronium - 4e+17 kg/m^3
Diamondhead's weight (High-End) - 3.64e+16 kg
Diamondhead was punched to the Moon from 8:17 to 8:21
Timeframe - 4 seconds
Distance to the Moon - 384,400,000 meters
Speed - 96,100,000 m/s or 0.3206c (Relativistic)
Kinetic Energy (Low-End) = 1.4749092130500001e+18 Joules or 352.51 Megatons (Mountain level)
Kinetic Energy (Mid-End) = 9.49236442245e+18 Joules or 2.27 Gigatons (Small Island level)
Kinetic Energy (High-End) = 1.68080822e+32 Joules or 40.17 Zettatons (Small Planet level+)
Final Tally
Gravattack makes a black hole - 108.36 Ninatons (Dwarf Star level)
Malgax punches Diamondhead to the Moon - 352.51 Megatons (Mountain level) - 40.17 Zettatons (Small Planet level+)