When you buy the Thunderbolt Gundam Vol. 3 Limited Edition that came with HGGT 1/144 RB-79 Ball (Thunderbolt ver.) a flyer will be available for you to fill up to be able to join the contest.
***This offer is only valid in Japan
Release Date: TBA
images and info from gundam.info and scan from Gundam Thunderbolt vol. 3 insert flyer
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