Onaga is hard to beat in MKD lol. So far, he is tops on being cheap in 3D fighting for MK. I would even put him over Khan. With out the Kymdedod, I would have NEVER beating Onaga lol. Hit one of them, than put out one long combo. I try to used 3 per round(You only got 6). And if the fight makes it to round 3. Than I pretty much screw.
Onage thown does a lage amout of damage. Than he has a unblockble flame thowing thing. Ground pound. His normal's do a lot of damage. And he blocks most of your moves. Good thing he lacks combos. BUT He more than makes up for it with Boss "Hit Points." If I land a combo on say Subby or Scorp, There going to feel it. Onaga takes less damage for thsos combos. Projects have no effect on Onage.
In all Onage would be a hard match up, for any one. The guy is Super Cheap lol. Maybe more cheap than Kintaro. Because Kintaro can be hurt with projections. Subby's iceball or Scoprion's spear saves them from Kintaro. But not Onaga. Onaga better leave the shinny things at home for this fight lol. Like I said, he is REAL hard to beat with out the keys to the realm you smash.
Your reffering o the Soul Steal SDM version? yeah, that would have worked in Grabs affected onaga at all... He's not the terror he once was in Deception, but everything is still intact, including grab and projectile immunity (Grab immunity goes away only for comparative sized characters such as other bosses like Blaze, Goro, Kintaro, Moloch and Motaro)