Como decimos "ropa arrugada" en inglés?

I would indeed use ''wrinkled''. IMO, it's the best one

Thanks!

You're probably looking for 'wrinkled clothes/clothing', in the sense of 'ropa no planchada'. A 'crease' is more or less 'raya', a linear, partial fold in fabric (made with an iron) or metal. 'crumpled' only applies to materials like paper or metal. 'rumpled' can be a synonym of 'crumpled' (i.e. for paper), and can also be used for clothing or hair in the sense of 'revuelto' or 'despeinado'. All three are 'native', which one you use depends on context.

I would surely use wrinkled, it’s the most appropriate and natural one.

Thanks Isabel!

wrinkled clothes. por ejemplo: your shirts are wrinkled! , those wrinkled t-shirts need some washing dude!