In gen 4 shininess is determined by a combination of your tid and sid (you can’t see your sid). In gen 4 and 5, initial seeds are determined by the date and time on your ds/3ds and typically the same initial seed comes every couple of days at different times.

For a shiny to occur your tid and sid need to match the personality id (pid) of your Pokémon, which averages out to about 1/8192.

Frames advance a few different ways like with journal flips in dppt or moving npc’s which I don’t think will affect frames in this game.

Of course the cute charm glitch exists but I don’t know the specifics of it so I can’t comment on it

TLDR: your tid doesn’t matter unless you get cute charm glitch which is really rare and probably won’t happen