Oh, not all his stuff are free. Just the three in the giveaway because those were the three that gary the gengar lied to obtain and started trading them all over the place for profit.
Since no action could be taken because technically gary did not break any rules, the mods, mattj, and I agreed to hold a giveaway making them free so he could not profit off of them anymore.
Other than the Mew, Entei, and Raikou, I am still trading the rest of mattj's stuff very sparingly. If you notice, stuff like his Lugia, Ho-oh, Suicune, Kyogre, etc are still pretty hard to find in the wifi forum even though they're fully redis.