Hmmm, interesting piece! It appears to have been released during Scramble City. It says "Scramble Gun Set" in Japanese at the bottom. The top left, under VS, reads "Exciting" lol Here are some better pics of the set: 未開封 TF トランスフォーマー スクランブルガン... - ヤフオク! There was another set with Ultra Magnus in place of Optimus, as well. https://www.amazon.co.jp/dp/B07KMD14RN The soft vinyl (ソフビ or Sofubi) Optimus Prime was also sold in a VS sets with Megatron: トランスフォーマー ブリスター ソフビ。 | 昭和・レア物展示販売 こども野球館 There is also a Rodimus vs. Galvatron set: 『トランスフォーマー/ソフビ製VSセット』 as well as a Metroplex figure: タカラ トランスフォーマー メトロフレックス ソフビ 当時物 クローバー タカトク コンボイ ブルマァク ロボット メトロプレックス「中古」の落札価格|ソフビ|ヤフオク! 落札相場- オークファン(aucfan.com)
Thanks for all of the info! The Megatron looks so odd (in the initial set, not the vinyl) I thought it could be a KO. Also, anything with “exciting” on the packaging is a must buy...