There's a Stockholm-Malmö sleeper, which can at least get you to Copenhagen by the morning (there's only about 20 minutes between Malmö C and Copenhagen H). Use

There's a Stockholm-Malmö sleeper, which can at least get you to Copenhagen by the morning (there's only about 20 minutes between Malmö C and Copenhagen H). Useful if you need to get to Germany. > a expensive taxi You should be able to get refunded for that, if you had a through ticket, and maybe even without a through ticket if you ask nicely (for travel to/from Germany, DB sells through tickets to Sweden via their website).