夢大陸アドベンチャー (Yumetairiku Adventure)
© Konami 1986 -- ¥?
Everytime you finish a stage and he rests on a pedestal a thought bubble appears above his head, now and again a "Moai" appears in that bubble.
The Dragon Boss looks like the dragon in the Gradius 2 MSX beta stage.
Thanks to GOGS & King Moai