Lol, later'd be better for me, anyways, I'm pretty busy myself at the mo. I'm in my senior year of secondary school, so I've christmas tests all this week and next week, at State Examinations next June. It sucks:(.
Yeah, it's a pity Ruby Sapphire and Emerald only use one image for the background. It makes editing it very.. Well, it's been said, limited. It's pretty good, what you've done so far, although there are some things to take into consideration. For example, the Logo. It's cool that you changed it from Black and White to Black and Red, but it looks a bit odd due to it's positioning. Try to keep it proportional, it looks alot better. (i may not be phrasing it right, but I mean to say you should have "Nitrogen" directly underneath "Liquid"). It'd look pretty cool that way, the font is a nice change to the official kind.
Anyways, onto the rest.. The background is.. Petty good, considering you were limited to Metagross' palette. I think that's fine. The thunder is cool too. Perhaps have it so Metagross is in the centre, and there are two lightning bolts coming down either side of Metagross? If that's possible, it'd give the Titlescreen an overall symmetrical look, which is normally a no-no in spriting, but in this case it'd work. But it's pretty good, altogether.:D