| Galaki said: I tried putting it to sleep but it said failed? Was that just a miss or cannot-be-slept? |
Probably just a miss, no pokemon is immune to sleep unless they have the Insomnia, Vital Spirit or Soundproof ability, which Thundurus, Tornadus and Landorus don't have.
What are you using as a Sleep move, Sing or Hypnosis? If you're having that much trouble putting it to sleep, you could potentially wait until you can transfer Darkrai into your game and use Dark Void on it, or you could get a Darkrai from someone as a trade.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
