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Hey man, I checked Method H-2 frames up to 1 billion. There was only one spread that fits your criteria (Mild, 31/31/30/31/31/30) but even with Synchronise it doesn't have the necessary encounter slot for Tropius. And even so it is on frame 630 million or so (hell of a long time).
Do you still want Tropius or would you prefer something else? If you still want Tropius then you will have to lower your standards for a few of the IVs I think :( sorry for the inconvenience
I mainly play VGC so I have little interest in pokemon without pentagon. Maybe you can do some custom dittos for me if the tropius isn't doable? you can also rng tropius in DPPt iirc
So do you want to do more? lol ok. I want a 30/31/30/31/31/31 Naive ditto and maybe a 29/31/31/31/31/31 Mixed nature (Maybe Hasty?) ditto. Let me know if you want to do more xD
That will be fine ;) I just don't feel like trading just the Tropius is fair lol. If I had to wait a few hundred million frames in Emerald then it would be a different story, but not if it is from 4th gen :P