I was thinking originally that I wouldn't be able to download this special Mewtwo as I kept getting Error Code 52003 on my Nintendo DS as my Nintendo Wi-Fi USB Connector just wouldn't connect to Nintendo WFC.
Earlier today, I decided to take a HUGE risk and turn off my Windows Firewall and AVG Anti-Virus and install the Nintendo Wi-Fi USB Connector while they were turned off.
I managed to install it correctly and it has connected successfully every single time today and I have downloaded this 1st Anniversary Mewtwo Event Pok?mon on my copies of Pok?mon Black and Pok?mon White now.
I am really happy that I am back on Nintendo WFC as it wouldn't connect so much that I thought Nintendo's servers for the Nintendo DS had been discontinued and now I have downloaded this Mewtwo, I am happy that the servers are still operational for the older games.
I am still wondering if I'll be able to get around Nintendo WFC Error Code 86420 on Animal Crossing Wild World as I used to go out to other people's towns quite regularly back in the day.