Maniac Tunnel Platinum · Area
The Maniac Tunnel starts in the Ruin Maniac's house on Route 214 and is dug deeper as you discover more Unown. The Ruin Maniac challenges you to a race: you register Unown forms in your Pokédex while he keeps tunnelling. After you have seen all 26 letters, his tunnel breaks through into a secret chamber of the Solaceon Ruins where the rare ! and ? Unown appear.
- Wild Pokémon
- 2
- Items
- 1
- Trainers
- 0
Connects to: Solaceon Ruins · Route 214
Maniac Tunnel on the Sinnoh map (marked at Route 214)
Wild Pokémon
Maniac Tunnel
| Pokémon | Type | Lv. | Morning | Day | Night |
|---|---|---|---|---|---|
 Geodude | RockGround | 23–25 | 80% | 80% | 80% |
 Hippopotas | Ground | 24–26 | 20% | 20% | 20% |
Geodude 11% Hippopotas 11%Only in shaking grass while using the Poké Radar (after the National Pokédex).Ruin Maniac Cave Short
| Pokémon | Type | Lv. | Morning | Day | Night |
|---|---|---|---|---|---|
| Geodude | RockGround | 21–23 | 95% | 95% | 95% |
| Hippopotas | Ground | 22–24 | 5% | 5% | 5% |
Geodude 21% Hippopotas 1%Only in shaking grass while using the Poké Radar (after the National Pokédex).Ruin Maniac Cave Long
| Pokémon | Type | Lv. | Morning | Day | Night |
|---|---|---|---|---|---|
| Geodude | RockGround | 22–24 | 90% | 90% | 90% |
| Hippopotas | Ground | 23–25 | 10% | 10% | 10% |
Geodude 21% Hippopotas 1%Only in shaking grass while using the Poké Radar (after the National Pokédex).Chances are the game’s encounter slots: grass and caves 20/20/10/10/10/10/5/5/4/4/1/1, with the two 10% slots changing by time of day (morning 4:00–9:59, day 10:00–19:59, night 20:00–3:59); surfing and the Old Rod 60/30/5/4/1, the Good and Super Rods 40/40/15/4/1. Where to find every Pokémon.
Items
| Item | How |
|---|---|
| TM28 Dig | Item ball |
Hidden items show up on the Dowsing Machine Pokétch app.
Tips
- Geodude dominates the tunnel (80–95%), and Hippopotas appears more often the deeper the tunnel gets, up to 20%.
- The tunnel grows once you have seen 10 Unown forms, and again after all 26.
- TM28 Dig is in an item ball inside the tunnel.
- Once it reaches the Solaceon Ruins, catch the ! and ? Unown in the new chamber.
- Hippopotas and Geodude can both be found with the Poké Radar here.
Walkthrough: Part 9: Route 214 to the Pastoria Gym
FAQ
How do you open the Maniac Tunnel in Pokémon Platinum?
Register more Unown forms in your Pokédex; the Ruin Maniac on Route 214 digs further as your count grows, reaching the Solaceon Ruins after all 26 letters.
Where are the ! and ? Unown in Platinum?
They only appear in the Solaceon Ruins chamber at the end of the finished Maniac Tunnel.
Where is TM28 Dig?
It is in an item ball inside the Maniac Tunnel.
What Pokémon can you catch in Maniac Tunnel in Platinum?
2 species: Geodude, Hippopotas.
Sources & picture credits
Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances, items, trainers, rematch teams, gifts, trades and shops come from the pret/pokeplatinum decompilation, and the Pokémon and trainer sprites are drawn from the game’s own graphics in it. Location pictures © Nintendo / Creatures / GAME FREAK, archived from the Pokémon Wiki on Fandom (listed on the image gallery).