There's no timeskip in Bleach...yet. Except the couple months between the end of the Soul Society arc and the beginning of the Bount arc. But on with the tropes.
-The lead should be not the sharpest tool in the shed, while his rival is a relative genius.
-The lead will have at least one physical transformation power-up, if not more.
-He will never stop getting stronger.
-Deus Ex Machina. The lead will be losing in a fight, and then somehow he'll turn around halfway through and beat the crap out of the other guy. WITHOUT powering up further.
-He'll be loud and obnoxious, but you can't not like him.
-There will be at least one female with giant breasts.
-One of the female characters will have a secret crush on the lead.