fun combos I've found with z-dropping fruit:
First one I use a lot, toss out a cherry and run into short hopped Fair to grab it, possibly even a full jump. I think full jump if preferential for this. next, z-drop fruit over or just behind opponent. typically, they will try to run after you mid jump, so the fruit will either hit them, or they shield/clash with it.
follow up with a Bair, which will again pick up the cherry.
from here judge distance. if opponent was hit away, run and throw cherry into a dash grab. the cherry will cover your approach.. If they blocked or dodged and are close, move to next step.
if they're trying to bait a grab, jump and z-drop again into a Dair as you move behind them. as long as you finish the move in the air, you can immediately go into a gab. If they dodge, follow them and throw fruit straight down. As long as they're in front of you, the cherry will hit and let you get some breathing room to build up better fruit, or even just follow up with an orange to knock them even farther away, which will surprise them.
Second, this one uses the galaxian and is based off the above combo.
build up to galaxian and throw it immediately, or when you can predict a shield. The opponent needs to be far enough away from the galaxian to circle back around.
run up and hop into Fair to grab.
z-drop the galaxian in fromnt of them.
follow-up with a Bair.
The initial hit from galaxian as it loops will hit their shield, then as you z-drop, you bair them to lower their shield more, the force of the attack will push them into the still bouncing galaxian, which will typically break their shield, or get it low enough that a quick side tilt will break it.
Next, you can just taunt them and, based on damage, either full charge a side smash, or a down smash, down smah, I think, has better knockback, but less damage, and takes longer to pull out. since they're dazed, though, this won't be an issue.
I have replays of me doing both of these on my 3ds, but I can't upload them without a capture card of some sort. I'm hoping I can transfer the replays to the wii-u version and upload from there, but in the mean time, try these combos out for yourself when you want to put on the pressure.