Dino of Mystery!

Dino of Mystery! is a quest in Mario Party Advance that is started by Dorrie. It can only be completed with Yoshi. It is initiated at Loch Dorrie, when Dorrie emerges out of the water. If another character enters the loch, Dorrie talks about how lonely he is, asking for a friend who "knows what it's like being a dinosaur," strongly suggesting that Yoshi needs to visit him. Once Yoshi arrives, Dorrie almost immediately asks Yoshi to be his friend; if Yoshi declines, Dorrie becomes disappointed, mentioning a Gaddget if they became friends, and if Yoshi accepts, the quest properly starts. After the quest is initiated, Dorrie is ecstatic about having a friend for the first time, and gives Yoshi the Soil Sonar Gaddget as a reward, ending the quest.

Names in other languages
Misterosauro!