View source for Maniac Tunnel

{{Infobox location
|image=Maniac Tunnel 26-28 Pt.png
|type=cave
|location_name=Maniac Tunnel
|other_info=Ruin Maniac Cave
|japanese_name=マニアトンネル
|translated_name=Maniac Tunnel
|location=Between {{rt|214|Sinnoh}} and [[Solaceon Ruins]]
|region=Sinnoh
|generation={{gen|IV}}, {{gen|VIII}}
}}

'''Maniac Tunnel''' (Japanese: '''マニアトンネル''' ''Maniac Tunnel'') is a tunnel that leads between {{rt|214|Sinnoh}} and the [[Solaceon Ruins]]. Before the digging is complete, it is known as '''Ruin Maniac Cave''' (Japanese: '''{{tt|遺跡|いせき}}マニアの{{tt|穴|あな}}''' ''Ruin Maniac Hole'').

The Ruin Maniac (who uses the sprite of a {{tc|Collector}}, in spite of his name), when the {{player}} first encounters him, will propose a race: he will dig straight through the mountain as the player finds the different {{p|Unown}}. This race, of course, ends in a tie; after the player has seen at least 26 different forms of Unown, the tunnel itself will extend straight through to the previously-inaccessible upper chamber of the ruins, where only the {{DL|List of Pokémon with form differences|Unown|? and ! forms of Unown}} are available.

As the player progressively sees the various forms of Unown, the cave will lengthen, and the encounter rates of the Pokémon in the cave will change (specifically, {{p|Hippopotas}} will be more common). Also, when player has seen 10-25 Unown, Ruin Maniac claims he is now known as '''Digging Maniac''' (Japanese: '''{{tt|穴掘|あなほ}}りマニア''' ''Hole Digging Maniac'').