Kyojin no Doshin: Kaihou Sensen Chibikko Chikko Daishuugou

Add-on disk to Doshin the Giant (N64) for the 64DD system. You slip into the role of one of three 2D characters who goes to bed, falls asleep and dreams that he is being sucked through the bedroom window into the recent past, more specifically the "Doshin Exposition '96." Your objective is to build 17 pavilions located within the expo. To do this, you need to interact with "Queen Companions" -- "booth babes" -- that can be summoned by... and there is no mistaking it for anything else... peeing hearts at signs. Er... yeah. This process is called "chikko." You can also "chikko" other people you bump into and make friends with them. Your friends are called "Teamers" and they can join you in a fight against opponents. You can win the fight by "chikko"-ing and shrinking enemies. If you lose the fight, you wake up in your room and simply try again.