Roles:
Flowey - Intended to be Drake the Snake, but can be taken
Napstablook - Free
Toriel - Intended to be Safety Inspector, but can be taken
Papyrus - Intended to be @pokarceus, but can be taken
Sans - @MMMbarney
Mad Dummy - Free
Undyne - Intended to be @songfall, but can be taken
Alphys - Intended to be Bighead, but can be taken
Mettaton - Intended to be @supercoolgames55 or @pixxer55, but can be taken
Asgore - Intended to be Super Derp, but can be taken
Omega Flowey - Free, but for people who took Flowey mainly
Asriel - Intended to be @moss-shadow, but can be taken
Chara - Intended to be Larry, but can be taken