Re: Magic Castle RePure Aria Paradise
The green feather allows the third girl to jump normally.
The red feathers will shoot out two small red projectiles whenever you are hit.
I believe the egg plant protects the boy or girl from getting poisoned.
The big breasted contract transforms the third girl into the big breasted girl for novelty sake.
Mermaid scales cause the wearer to move faster.
I don't know what the frog girl item, succubus heart, the vine (dark green figure 8), or the snowman do.
Does anyone know where the shops are to get the 199 item that is next to the shop girl, and the 750 item?
Just for everyone's information, the translation of contract descriptions is on page 10 and it's incredibly helpful, you should definitely give some rep for that.
For the ones you mentioned...
I assume when you say "the frog girl" you're talking about Pachi pachi, the green clapping girl. That one enables edge standing, which lets you stand on the air adjacent to any edge. Chaos' 2nd form has this effect by default (it's the little sparkly "platform")
I'm pretty sure the succubus heart affects stamina recovery in some way (the white bar) but I don't tend to pay enough attention to it to know how or how much.
"The vine" is a snake, from the naga girl. It allows Chaos' second form to shoot the powerful charged shot the first form has, as well as allowing chaos form to shoot out more bullets behind her during her running attack.
There are two snow men: Ice maiden and Ice Legion. Ice legion (the dark blue snow man) allows Pure to shoot her ice shard projectiles when jumping instead of her bombs, and the white snowman...I think makes both of Pure's forms hit harder, I'm a little unclear on that one.
Some of the less obvious affects that have been mentioned through the thread:
Using Pearl-tan's contract on Chaos' second form gives her frog bombs instead of egg bombs.
Using Flesh Doll's contract on Chaos' second form makes the strawberry bombs into her default attack.
Using the Harpy feather (green) on PureLove's forms changes her attack into a wind blade.
Using the Dark Fairy contract on PureLove's second form gives her a widely distributed wind disc attack.
The Sword Girl contract slowly regenerates the charge on the Magic Bubble (shield thing?) key item, once you get it. (It's normally only charged when you kill an enemy or bullet).
The gnome girl contract automatically collects money.
The Gray Slime girl contract halves the Affinity you need to open specially marked doors you find throughout the game.
If there are any other less obvious effects people have found, be sure to mention them.