Alright, time to state my case.
If Shujinko uses melee to uppercut Kokichi himself into a stun-lock, what's Kokichi gonna do? If Shujinko freezes him directly, what's he gonna do? If Shujinko hits him directly with a projectile or twenty then pummel him, what's Kokichi gonna do? If Shujinko just uses telekinesis to paralyze him with his disgustingly large LS advantage, then tear him in half, what's Kokichi gonna do?
All of this ignores Shujinko absorbing the strength of the robots, which he can do for multiple people in one moment, granting him the strength advantage (and then some), which he could then use to easily crush Kokichi with telekinesis or his thousand other moves.
Also, we know that each hand can activate telekinesis and move objects. This means Shujinko can restrain two robots at once, and potentially use them as human shields
I'm voting for Shujinko.