I Have the Answer to Mega Malamar

that’s the whole point

I don't think you can make it do anything. You said it is completely random and unpredictable. If you can control it is not random or unpredictable. It isn't pure chaos. I paraphrased what you said. I'll add the exact words.

you can’t end something that has already ended so let’s pull back the curtains and reveal the final ACT:DOOM I’ll be waiting for this bittersweet moment with that I mean bitter for you sweet for me

I request from @Thur55555555555 the power to summon endless Gengars and Marshadows, which will fill clasingla's shadow. Since clasingla is just darkness, they are just a giant shadow. Gengar can enter and control shadows, and Marshadow can enter your shadow and manipulate your mind. Those together will have complete control over clasingla!