Here’s every crossup setup that I use (feel free to make corrections, dunno how safe everything is to the exact frame):
Forward throw:
Immediate jump forward j.HK (Always lands in front, seems character specific.)
One tiny step j.HP (Crossup)
Back Throw:
Tiniest step forward imaginable, whiff jab, j.HP (Pretty sure this is the ‘unblockable’. Even if blockable, I usually have no idea what side I’m gonna land on)
Airthrow:
Immediate jump forward j.HP (Also seems character specific. Usually lands in front.)
Fajita:
One regular step, j.HP (Crossup)
One small step, j.HP (Lands in front. Safe.)
Immediate empty jump, cr.lk (Meaty cr.lk)
Tortilla:
Overhead, run back, stop, j.HP (Crossup)
Overhead, run back, stop (smaller distance), j.HP (Fake crossup)
Dash forward twice, run back, stop, j.HP (Crossup. Also the timing for fake tortilla > airgrab to punish backdash)
One small step, whiff HK, j.HP (Crossup)
Immediately whiff HK, j.HP (Fake Crossup)
Tortilla in Corner:
Dash forward twice, run back, stop, j.HK (Crossup HK putting you in the corner)
Run Slide (or after slide RSF ender):
Small run back, stop, j.HP (Crossup)
After I get the first knockdown of the match, I go for one of these, almost guaranteed. If you’re fighting a character that can teleport on wakeup (or Yun) OS run slide or U1 after the crossup j.HP whiffs.