Woah, yeah. That sounds like the complete opposite of what I just experienced. Like...dang it I deleted those old notes cuz they didn't make any sense to me, but before beating Red, at the Fanclub I was getting weird inconsistent frames that were about 7ish too high. I couldn't account for that. So I said, screw it, released, killed, RNG'd it at the E4 after beating Red (not that that was intentional).
Now of course, I have not experienced this before when I did a Timid Latios on an old runthrough on that cart, and a modest one too. But I RNG'd them both at the fanclub before beating Red (if memory serves me correctly) and I had no problems whatsoever... Oh wait I should have the notes for those last 2 runthroughs...