I edited the title of your post as blaming the software for your error is not the right thing to do here.
You bricked it, not anyregionchanger.
What did you downgrade to?
How old was your Wii?
What was the System Menu before you downgraded?
What System Menu did the Wii start it's life with?
Did you have bootmii/boot2 installed (I don't care about bootmii/IOS)
Why did you downgrade?
What's the capital of Uzbekistan?