When it comes to transformation, all I can think of is the beauty of light, the guardian sweetheart and the little goddess Hua Ling. You must have seen it.
I have a good recommendation for an idol theme like Princess Idol:
Quite rhythmic dancing+singing+lots of clothes+idols.
The first season has ended, episode 5 1, and the second season is still serialized. At present, episode 15 is a commercial animation, which mainly promotes a clothing store. Clothes can be imagined, changing clothes is a bit like transformation.
Akb0048 Dancing+Singing+Lots of clothes+Idols
This animation is based on the real idol group akb48, so there are many songs, which sounds good, because there are many groups and more clothes ~
I think these are the most suitable. Actually, you can also look at something else. There are some classic cartoons that you can also consider.
With a bunch of teenage comics:
Playing is a special kind of love. ※。 . . . Others are fine, too.
Rose girl doll, quite good. ※
Transform! ※! The idol princess is ok. . . .
Little Goddess Flower Bell ※
Dream cake maker, episode 63, not bad. ※
Alice College is a kind of campus class, which is quite funny. The man is handsome and the woman is kawaii. ※
The girl with a soft voice is very beautiful and popular. ※
SA gifted students in the school, 24 episodes, quite good.
Vampire knight campus class, episode 26, handsome man
Lu Lu badminton's rebellious men and women are handsome, but tragic. .
The striking hostess of Xia Na is so cute. . not bad
25 episodes of Dragon and Tiger, the woman said. .
Sakamoto Naimu's secret mistress is super beautiful, male master. . Waste wood. .
Campus courseware of romantic idol club, episode 12. . not bad
Joan, the thief of Kamikaze attack team, is quite old, but she looks good. .
Angel's heart, humanoid computer, a little H, but the hostess is very beautiful. .
Love bubble gum 13 episode, the hostess is very beautiful, not bad.
The story of "Glass before Dawn" mainly revolves around the story of a princess from the moon boarding with her family on the earth.
Lucky stars are funny and popular.
Ors and the goblin are both beautiful people.
The hostess of angel beat is very beautiful. . . not bad
It's good to test the summoner to an idiot. Very nice. . 20 10 1 month
The girl monster pomegranate is good, and the man is handsome. . . . I quite like it.
The list of banned books is good, good, although the characters are not particularly good-looking, they are still quite popular.
Scientific super electromagnetic gun. I like it. . . .
The crimson agreement is fine. . Xinggemei
Noda is beautiful as a song, but he is not very beautiful.
Students' general illusion. . . .
The fruit basket is very old and still moving. . .
The number of things from heaven ...
Although the golden string is good, it is not finished. . .
The mistress of the battle housekeeper is so cute. . . .
Idol paradise is not bad, so is love triangle. . . 、
The melancholy of the erotic palace in spring is good and very red.
Looking for the full moon is very loving and touching; ;
Sister and princess are beautiful, but the content is not so good. .
Cats hope that love triangle is possible. .
The incredible game can also be の,,,
Good girl in heaven. .
Magician Mirumo Mirumo is very old. . Not bad.
Tokyo Cat is an old cartoon. . not bad
The magic girl is Ye, which is quite red. .
The story of rural Cai Yun is OK. . . Dude. . Very handsome.
The literary girl is not bad ...
Girl of the Snow, clannad airkey's super invincible classic tear trilogy,,, alas,,, there is love in chaos.