This article is related to a game, manga series or other media that has not been released outside Japan. The coverage here may differ from what it would be in an official translation.
The Mobile (Japanese: ケータイ) is an item in Densetsu no Starfy 2. During the events of Resshi Lake (Stage 9-5), the Mobile was dropped by Puchi Ogura #9. According to its item description, it is used to talk to people from far away, although Starfy and Moe never use it this way.
Starfy and Moe find Puchi Ogura #9 in Stage 9-5. He appeared to be sad about the kidnapping of someone but Moe thought he was suspicious and questioned him whether he was a criminal. Puchi Ogura #9 asked Moe to provide evidence, to which Moe asked Puchi Ogura #9 what kind of evidence, twice. Puchi Ogura #9 felt insulted by this and walked away, dropping the Mobile.
Starfy later finds Funazou, who tells him that the mobile phone is a red seabream model, ♥808 Pink Pearl Type (Japanese: マダイモデル♥808パールピンクタイプ), which is apparently a rare model. Funazou explains that it is a limited edition colored for girls (Japanese: ガールズげんていカラー) and there are only three of these in the world. Funazou says that Lovely has one.
Later, Starfy and Moe find Resshi. Resshi asks if Starfy and Moe have found her daughter (mentioned in the Post), to which Moe replies he found the 'suspicious fellow'. Resshi notices that Starfy and Moe have a mobile and Resshi states that it is the same type of mobile that her daughter has. Resshi asks Moe where he found it, to which Moe replies it was dropped by the suspicious fellow.
In the conversation with Resshi, Moe asks Starfy a series of four questions related to the information he gathered about the Mobile. The answers are, in order; the second option - 'No' (Japanese: いいえ), the first option - 'Girl's Limited Color' (Japanese: ガールズげんていカラー), the first option - 'Because there are only three in the world' (Japanese: せかいに3つしかないから) and the first option 'He is a kidnapper!' (Japanese: アイツは ゆうかいハンニンだ!)
Reference in Densetsu no Starfy 3
In the Jungle (Stage 5-2), Moe asks Moon if he can borrow her Mobile to call Echigyoya, so he does. The sprite of the Mobile appears inside of a speech bubble from Moe. Moe finds out that the phone number is not currently in use.