Advanced GN-X Conversion kit for MG GN-X - 13,000 Yen (inclusive of tax).
Reborns Gundam Origin Conversion kit for HG 1/144 Reborns Gundam - 10,000 Yen (inclusive of tax).
Another limited Gunpla not shown here is Advanced GN-X Conversion kit for HG 1/144 GN-X - 6,000 Yen (inclusive of tax). Images and information of other limited Gundam items for the event can be seen in this previous posting.
Chara Hobby 2010 will be held on August 28th and 29th at Makuhari Messe in Chiba.
Images are from ToyWorld Forum.