>>48792918That romhack probably uses the game's default AI, and since it's a DS game it's probably harder to modify it than a GBA game
Gen 7's AI still does stupid things at time, like spamming status moves against Manaphy in the rain (which would immediately get cured by Hydration), even though it's capable of utilizing more advanced tactics like:
>Kukui baits a water move and switches into his Gastrodon to absorb it>Switching to a Pokemon that knows Defog against Molayne's Klefki makes him switch to something that can kill it 