This tech is really weird in that you have to wait until trait just about runs out for the Sonic Pound to crossup. The combos that I found to work the best are 4 (F213 xx LK Cancel) x2 F213 xx LK ~ MB Sonic Pound, and 4 (D12 xx LK Cancel) x 3 D12 LK ~ MB Sonic Pound. To get this to crossup on the big guys I used F21 (Pause) ~ Far MB Sonic Pound and F21 (Pause) ~ Regular MB Sonic Pound for a non-crossup.
I couldn't get Sonic Pound to crossup on Black Adam or Sinestro because of their tall hitboxes, but feel free to try.
Also wanted to post this because reasons.
50% Meterless