How do I disguise my voice as another voice, like a character from a series (Specifically Twilight Sparkle)?

I want to disguise my voice on Skype as a character from My Little Pony, specifically Twilight Sparkle. Is there a specific voice changer I could use so that I can disguise my voice as Twilight Sparkle on Skype? Please help ASAP.

There are voice changer devices and apps out there. But they won't make you sound like Twilight Sparkle unless it's a toy designed to do so. Even then it's not going to sound right. But you'll end up having to talk into a device and get your mic to pick up the output from that device. Likely picking up some bleed through of your actual voice.

For ASAP there is Google.
Otherwise there is a good reason why Skype does not offer a voice changer ;)