Maniac Tunnel
Pokemon Diamond and Pearl
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
 Geodude | 24 | Walking in tall grass or a cave | 80% |
 Hippopotas | 22-25 | Walking in tall grass or a cave | 20% |
Pokemon Platinum
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
| Geodude | 23-25 | Walking in tall grass or a cave | 80% |
| Hippopotas | 24-26 | Walking in tall grass or a cave | 20% |