The boat is not the exact concept with the metal rod and goes halfway across the curve, so it will not be counted as a phantom gem. However these kind of things are rare to some extent that you can't find videos of it running. As you can see the boat is battery powered.
モンコレＡＧ ムービーバッグ 劇場版 蒼海の皇子マナフィ
"Moncolle AG Movie Bag Theatrical Version Prince Manaphy of the Blue Sea"
A luxurious set with a lot of rails, image maps, backgrounds, script, etc., a ship called Blue Lagoon is the Plarail boat, and it runs on the rail with a figure on it. Since there is no Plarail logo in the product name, it is often removed from the Plarail category.
https://page.auctions.yahoo.co.jp/jp/auction/q346756205
モンコレＡＧ ムービーバッグ 劇場版 蒼海の皇子マナフィ
"Moncolle AG Movie Bag Theatrical Version Prince Manaphy of the Blue Sea"
A luxurious set with a lot of rails, image maps, backgrounds, script, etc., a ship called Blue Lagoon is the Plarail boat, and it runs on the rail with a figure on it. Since there is no Plarail logo in the product name, it is often removed from the Plarail category.
https://page.auctions.yahoo.co.jp/jp/auction/q346756205
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