GAME START!
The match starts most bad Dededes will throw gordo right away. Gordo cannot be abused... its better to throw people off with it and to use it as a landing trap when they recover. The thing you should do is shield a shit ton. If you have the reaction to powershield everything that is best. Grab is what you want ultimately as it is Dedede's highest damage potential. If you cannot punish something on whiff with grab go for a forward tilt or dsmash if possible. If they are in close quarters and a grab is not fast enough do a dtilt(it is D3's fastest move at 7 frames?). This is the way Dedede operates in this game... it is very simple, but sometimes efficiency is the most effective strategy.
Dthrow can lead into a lot of strong followups especially at low %
at 0 look to set up a dtilt dtilt chain into di chase, a couple % higher go for fair or rar bair(rar bair is probably the best option bc you can sometimes link another out of short hop or full hop bair into landing bair), rising nair is another easy followup at low %, at higher %s go for uairs and try chasing their landing with more uairs or upangled gordos, when they are super high % stop dthrowing and start bthrowing or fthrowing for potential kill throws(sometimes this is inevitable bc DDD struggles at landing the final blow).
last but not least abuse the landing bair it is safe on regular shield if spaced correctly AND it kills(some fast chars can punish it)
thanks for reading my short guide!