Figure I’ll post this here since I never see anyone use it:
EX-dp, land, short delay, rh-dp (2 hits)
If you just do EX-dp rh-dp you normally get only the 2nd hit of rh-dp. But if you delay the rh-dp a bit, you can get both hits. With both hits, it does more damage and stun and builds more metre than using a lunge punch.
I never tested it thoroughly but I know it works on shotos and I think I’ve done it vs Dudley and Q as well.
You can also do this on any of the characters that you can command grab, cr. mp xx upkicks to as well. Be careful though, it seems to miss sometimes (maybe the distance is more strict?)
Command grab, cr. mp xx EX upkicks, walk forward a step, upkicks