A: Undertale Plus is a mod for Undertale that allows you to completely customize your Undertale experience though various toggles.
A: A mod.
A: Yes.
A: No.
A: When you can.
A: No.
A: It's a mod that allows you to customize Undertale to your liking.
A: You can toggle them both freely.
A: Everything being shown in previews should be toggleable. It's so toggleable that you can have a vanilla Undertale experience if you really wanted to.
A: No.
A: We'll be taking feature requests after the first release of the mod and push them in an update.
A: When there is a position in the team available, an application will be opened and you can fill out the application at that time.