Well...

Flipping to or from a page without any caught/defeated info doesn't advance the frame by one. It doesn't do anything. If you do like you listed, you'll end up on frame 881. Trust me, I just did Heatran. My target frame was 7122, his monster frame was 1, and I had no roamers. 7122-1-5*=3558 Journal Flips. *=because I took 128 steps w/5 pokes in my party in order to get my even frame with an odd monster number and no roamers.

Just wanna save you some time and headache. :)

I don't have to, I could do what I said before... XD I can't remember which legendary pokemon I did this with before...

Oh, yeah, that means you'll need an odd number of pokes in your party and to walk 128 steps...

nope, :P

Oh, um, do you have any roamers out?

I've done this before with one of the wild legendaries...

My target frame is 882. so...

882-1-0=881

I already have my journal pages set for when I get to Dialga.

1 page w/o capture or defeated wild pokemon. Then 440 flips w/ captured or defeated wild pokemon

What's your target frame?

well...I'm not worried about walking 128 steps to advance the frame, XD. only if it matters when I need to catch Dialga, but I guess you answered my question. Thanks :D

Oh, yeah, What I meant is that if your "target frame" is 402, but Dialga's monster frame is 1, and you have no roamers out, you'd have to have an odd number of pokes in your party and take 128 steps to advance your frame by an odd number (1,3, or 5) in order to get that even target frame of 402. Make sense?