Wanted to add my own little thing here.
At the current moment in PokeMMO, Dusk balls are arguably the best pokeball to use right now, as they are cheaper than repeat balls, and are worth using compared to timer balls if you're using Breloom as well, since they don't max out on catch rate until I believe turn 5, but someone might need to fact check me there. [FUTURE EDIT]Wanted to add that this is now sort of outdated, as there are multiple options to use depending upon the strategy you use, such as dream balls, still dusk balls, repeat balls in certain scenarios, and more. Keep looking into different methods, and you will find different ones. I like to use dusk balls still, but I cannot say they are the best anymore.
I wanted to include my own strategy I cooked up recently for ditto farming. I have used the Breloom method in the past as well as the Smeargle with assist method to great success, but I with the introduction of false swipe in Meowth's learnset plus assist as an egg move, it opens up the ability for you to use Meowth as a Ditto catcher, allowing you to get pickup items while farming Dittos.
My Meowth only has 2 moves, false swipe and assist, while my Paras has spore and dig which is pretty common for assist-oriented movesets. However, because Meowth's only attacking move is false swipe, you don't need to use leftovers at all, since your Meowth will NEVER fall under 1 HP. This is useful because it can save time in the long run since you won't ever go through the leftovers animation + text. If you wanted to have the option of using it as a payday mon still, you might be able to run leftovers but I have no experience with that set. I used a payday on my Smeargle catcher, and I only ever died ONCE after getting unlucky.
The Two Pokemon In Question(Items don't matter):
