Riley's Lucario and the Steel Cavern
Chase 
Riley’s berserk 
Lucario across Sinnoh and trade for a Mercury Potion.
Needs: 7 badges, a 
Bronzor (level 10+) to give away
Reward: 
Steel Cave Pass, access to 
Riolu
Sinnoh side quests
Sinnoh is where your adventure starts, and many of its side quests unlock things you will use for the rest of the game: Riolu, 
Gible, 
Heatran and the lake trio. The guides below give full solutions, so they contain spoilers.
Suggested order
Section titled “Suggested order”- Do Wayward Cave early. Go as soon as you have 100 Pokémon caught: it opens the way to Gible.
- Clear the Lost Tower ghosts. You need 6 badges, and its Odd Keystone is one of the two you need for Nuzbar Village in Jvaloh.
- Combine two Iron Island quests. Riley’s Lucario and the
Sableye that starts the Ethereal Wisps are both in the Iron Island caves (7 badges), so do them on the same trip. - Become Sinnoh Champion. Then do Heatran, followed by the Legendary Caverns (200 caught). The boss chamber of the Lake Acuity run also holds an Ethereal Wisp.
Quests
Section titled “Quests”Heatran at Stark Mountain
Return the 
Magma Stone to 
Buck, then defeat Heatran.
Needs: Sinnoh Champion
Reward: 10,000 F, Heatran roaming
Legendary Caverns
Daily maze of five trainers and a high-HP 
Uxie, 
Mesprit or 
Azelf.
Needs: Sinnoh Champion, 200 caught
Reward: 
Blaze Coinx5 and an item, sometimes a legendary core
The Sea's Legend
Manaphy
Buizel
Mantyke
Overqwil
PhioneEthereal Wisps and Sablenite
Starts with a vanishing Sableye on Iron Island; collect 100 wisps across three regions.
Needs: 7 Sinnoh badges to start; the wisp maps also need mining levels 60 and 80, 400 caught, Sinnoh Champion and Safari Tickets
Reward: 
Sablenite (from Mt. Pyre in Hoenn)
Small quests
Section titled “Small quests”All on one page: Small quests in Sinnoh. Every item ball in the region is listed in Items on the ground in Sinnoh.
| Quest | Starts | Reward |
|---|---|---|
| The three clowns | Jubilife City |  Old Rod |
| The Onix in the mine | Oreburgh City (1 badge) |  Moon Stone |
| Three Dustox | Eterna Forest |  Exp. Share (Untradable) |
| The Old Chateau dog | Eterna Forest |  Scooby-Doo Mount |
| Ninjask venom | Floaroma Town | TM74 Venoshock |
| Cleffa and the mansion key | Route 212 (North) |  Pixie Plate |
| Lost Tower ghosts | Route 213 House #3 (6 badges) |  Reaper Cloth,  Odd Keystone |
| Mismagius and Froslass | Route 216 |  Dusk Stone or  Dawn Stone |
| Wayward Cave | Route 206 (100 caught) | Access to Gible |
Other regions
Section titled “Other regions”Looking for the main story instead? See the Sinnoh walkthrough. The Battle Frontier and Battle Tower in the Fight Area have their own page: Battle Frontier and Battle Tower.