Hi! Just try to capture Giratina. I don't think it's possible to KO Giratina. Don't get fooled on the fact that the Master Ball catches like a boss. (It works like a normal Pokeball)
This took me about 1-2 weeks to create it. Leave suggestions for my next battle simulator. By the Way, Shout out to Sleek07! Credits to the guy who made Free Animated Pokemon Sprites! Thanks for trying it out!