My favorite matchup. It's a pretty easy and straight foward matchup. Spaced Bairs pretty much ruin her day. She can't do anything out of shield to stop you, it beats all of her approaches and wavedash-back baits. It also destroys missles. Cargo upthrow to Uair (the timing is tight, so make sure you're perfect) is a solid combo and works at killing %s. Samus isn't too fast so you should always have time to charge up your punch and you shouldn't have a hard time facing backwards (to spam Bairs). Giant Punch is pretty safe to throw out against her. Down B is surprisingly decent since Samus will be try to stay grounded. Ftilt is pretty safe and CC grab is nice. When she recovers from below, gimp her with a ledgehop Up B. Never use Nair in this matchup and don't shield much (you shouldn't need to, but she can poke your shield pretty well). There's alot of discussion on this matchup from me and Mexican from a few years back in the DK forums but I don't know how to search them up in the new smashboards layout. The metagames for these characters have barely changed and I think everything is still relevant.
Look up Green Ranger vs Duck. Duck has a lot more experience than Green Ranger (IMO) but GR still brings the pain with his smexy DK skills.