I don't have Elm calls in Platinum. What we use instead of Elm calls is the journal. It advances the frame by 2 for every flip.
However, to save myself the time, I selected a frame of 10, which would be the equivalent of frame 3 in HGSS. It requires no advancing.
Now here's the problem. When I pick the egg up on a seed with frame 10, I hit frame 11. In HGSS this would be the equivalent of trying to hit 3 and getting 4.
So I figured I was doing something wrong and selected a seed with frame 11, which would be like picking 4. And when I do that, I collect my egg and it's on frame 3.
This happens no matter what I've done. 3 turns into 4, and 4 turns into 3. And I can't figure out why.