Frozen dress up games
Almost every game on this shelf dresses both sisters, and that is the actual puzzle. Two people who have to look related and not matched, from two wardrobes that pull in opposite directions.
Autumn Fair 
Sisters Extreme Throat Emergency 
My Sister's Wedding Day 
Two sisters, one problem
Elsa reads cold: structure, pale blues, nothing fussy. Anna reads warm: layers, pattern, a bit of mess. Put them in the same scene and you cannot style one without thinking about the other, which is why these games last longer than a single character would.
Anna And Elsa Arendelle Ball has them hosting rather than attending, which is a different brief and a stricter one. Anna And Elsa Summer Festivals puts them in the furthest thing from what they wear on screen. Anna And Elsa Glittery Bridesmaids is the hardest of the three: they have to belong together and neither one is allowed to disappear.
Elsa on her own
Elsa Runway Diva takes her out of Arendelle entirely and into fashion week, which turns out to suit her better than a coronation does. Elsa And Rapunzel Princess Rivalry is the comparison game, and it is worth more than it looks because both characters are defined by their hair before anything else, which is the one thing you cannot restyle your way out of.
Anna on her own
Anna gets the better material. Anna's Crush makes you dress Kristoff as well, so it is a pair rather than a character, and Anna Loves Glittery Outfits hands you a rail that is entirely glitter and leaves restraint as the only move.
Nearby
Everything Elsa is gathered under Elsa, everything Anna under Anna. The wider Disney shelf is princess, and the snow and ice aesthetic without the characters sits in fantasy.
Frequently asked questions
Can I dress both Elsa and Anna?
Most of the games here put the two of them in the same scene, which is the point: they have to look related without matching.
Are these Frozen games free?
Yes, every one, and they load in a tab rather than asking you to install anything.
Is there an Elsa coronation dress game?
The ball and formal games cover the gowns. Elsa Runway Diva is the one that takes her somewhere else entirely.
Do they work on a phone?
Yes, all of them are built for touch.
Can I save the outfits?
No. Screenshot the finished pair before you close the tab.