Hey...I'm surprised this wasn't mentioned here yet...against Lucas and Ness, well, Snake literally has a near infinite chain grab against them. Here's how you do it:
Grab, neck snap times X until they break free, re-grab.
That's it. When ness/lucas break out of it, they just pull a little bit away from Snake. They're still in stun animation, so you can regrab if you're quick enough. It's also quite easy to just mix it up with delaying your grab (if they start dodging) to keep them in this chain grab. Chain grab to your hearts content and finish off with your choice of tilt, lol.
Edit: As if people don't hate Snake enough already