Magical Girl Mizar
From Transcendence AU Wiki
Magical Girl Mizar is an in-universe anime based on the concept of Mizar being a magical girl.
History
Ian is somehow involve in it's creation, and has Dipper and Mira provide voices for the pilot episode.
However, Alcor would keep getting choked up on his lines, and eventually had to leave. The official role would be filed by a talented but fairly unknown voice actor instead. The demonic effect is achieved by a cheap dollar-store voice changer.
Alcor insists he sounds nothing like him, since his voice cracks to much, and Mira finds this funny.