You'll only ground break against Peach if you mash out when she's mid pummel. It's actually faster to rotate the control stick and flick the C stick than to mash the buttons. Be careful though, if you mash anything other than downwards, even people who don't usually air release you will do so.
There are no solid tips vs Diddys. They all play differently, you need to adapt to them and avoid their bananas/use them more effectively.
There are no solid tips vs Diddys. They all play differently, you need to adapt to them and avoid their bananas/use them more effectively.