Bank of the Wild River (N4) opens after you play the Blue Music Box. Use the finder below for every Gray, Red, Green, and Blue chest, all eight Musical Coins, and the Pesce boss arena—with exact room-map links for Day/Night and each map variant.
FIRST CLEAR PRIORITY
Open the Gray Chest for the Trident, then pair it with the Yellow Book
Carry the Gray Key to the Gray Chest and take the Trident. Combined with the Yellow Book from N5 The Tidal Coast, it calls lightning over the canyon and opens S4 The Steep Canyon from The Big Bridge. Come back later for the Magnifying Glass, Statue, Rocket, and Musical Coins.
N4 CHECKLIST · BANK OF THE WILD RIVER
Bank of the Wild River Finder
0 / 13 targets marked · browser checklist only
Map links open the Room & Target Index for this level. Match Day/Night and variant to your overworld state. Later variants can move some routes, but chest colors and treasure rewards stay the same. Progress is stored only in this browser.
ALL FOUR CHESTS · N4
Bank of the Wild River treasures by chest color
Each chest needs its matching key color in the same level. Colors are not unlocked globally—if you drop a key, go back and pick it up again. Room numbers below match the default Day layout; open the map link for live markers on your current Day/Night and variant.
| Chest | Treasure | Key rooms | Chest room | What it does | Map |
|---|---|---|---|---|---|
| Gray / Grey | Trident |
0, 10, 20, 21, 22, 24, 29 | 0, 10, 20, 21, 22, 24, 29 | With the Yellow Book (N5 Gray), calls lightning and opens S4 The Steep Canyon. | Open Gray Chest map |
| Red |  Magnifying Glass |
7 | 3 | Enables the overworld magnifying-glass view for closer map inspection. | Open Red Chest map |
| Green |  Statue |
8, 15 | 9, 14, 19 | Unlocks The Tidal Coast V3 and Tower of Revival V3 layouts. | Open Green Chest map |
| Blue |  Rocket |
1, 18 | 1, 18 | Completion treasure for the Perfect set. No major overworld road unlock. | Open Blue Chest map |
MUSICAL COINS · MUSIC COINS
All 8 Musical Coins in Bank of the Wild River
Every level has eight Musical Coins. They are not required for the Perfect treasure screen, but finishing all 200 coins across the game unlocks Golf Building Course 4. Room numbers below match the default Day layout.
| Coin | Primary rooms | Also present in |
|---|---|---|
| Musical Coin 1 | 0 | 10, 20, 21, 22, 24, 29 |
| Musical Coin 2 | 1 | 18 |
| Musical Coin 3 | 4 | — |
| Musical Coin 4 | 5 | — |
| Musical Coin 5 | 8 | 15 |
| Musical Coin 6 | 8 | 15 |
| Musical Coin 7 | 8 | 15 |
| Musical Coin 8 | 23 | — |
Open all Musical Coin markers on the Room & Target Index → · Full Musical Coins Finder for every level →
BOSS · BANK OF THE WILD RIVER
How to beat Pesce
Pesce
Aquatic boss for N4 Bank of the Wild River. The arena is in room 16 on the default Day map, with strong water current and flying support spawners.
Bring Swimming Flippers (S3 Gray Chest) before this fight. Prince Frog’s Gloves help push against the current if you already own them. Dodge dragonflies and flies while you strike Pesce until the defeat sequence clears the arena.
Open Pesce map markers → · Boss catalog → · All boss strategies →
Current setup
A strong current fills the water arena before Pesce appears.
Aquatic pursuit
Pesce moves through the arena while Wario works against the flow and spawner pressure.
Defeat sequence
After the final interaction, Pesce retreats and the arena returns to a clear state.
MAP VARIANTS · DAY & NIGHT
When Bank of the Wild River layout changes
N4 has four progression variants on both Day and Night. Variant 1 is available once the Blue Music Box opens the level. Later variants open after you collect specific treasures elsewhere:
| Variant | Requirements | Notes | Map |
|---|---|---|---|
| V1 | None (level open via Blue Music Box) | Default first visit. Grab the Trident here. | Open Day map |
| V2 | Garlic (S3 Red Chest) | Powered dash opens extra N4 routes. | Open Day map |
| V3 | Prince Frog’s Gloves (N1 Green Chest) | Current-resistant swim routes for deeper revisits. | Open Day map |
| V4 | Air Pump (E4 Red Chest) | Late-game layout for remaining N4 routes. | Open Day map |
FIRST VISIT ROUTE
What to do in Bank of the Wild River on the first clear
Unlock N4
Collect the Blue Music Box in W4 A Town in Chaos, play it on the overworld, then enter Bank of the Wild River from the North coast path.
Gray Key → Trident
Hunt the Gray Key in the river room family, open the Gray Chest, leave for N5 Yellow Book when ready, and trigger the Steep Canyon lightning event.
Revisit N4 later
Come back for Magnifying Glass, Statue, Rocket, Musical Coins, and Pesce when Swimming Flippers, Garlic, Frog Gloves, or Air Pump unlock remaining rooms.
FAQ
Bank of the Wild River FAQ
How do you unlock Bank of the Wild River?
Play the Blue Music Box from W4 A Town in Chaos (Red Chest). That overworld event opens N4 Bank of the Wild River and N5 The Tidal Coast together on the North map.
How do I open the Gray / Grey Chest in Bank of the Wild River?
Find the matching Gray Key in the river room set (rooms 0, 10, 20, 21, 22, 24, or 29 depending on map state), carry it to the Gray Chest in the same room family, and open it for the Trident.
What does the Trident do in Wario Land 3?
The Trident pairs with the Yellow Book from N5 The Tidal Coast. Together they call lightning over the canyon and open S4 The Steep Canyon from The Big Bridge—an important mid-game South route.
What does the Magnifying Glass do?
It enables the overworld magnifying-glass view so you can inspect the map more closely. It is not required to open new levels, but it is useful navigation quality-of-life and counts toward full treasure completion.
How many Musical Coins are in Bank of the Wild River?
Eight—the same as every other level. Use the coin table above or the full Musical Coins Finder if you are missing one for 100% side goals.
How do you beat Pesce?
Enter the boss arena in room 16 with Swimming Flippers. Work against the strong current, dodge dragonfly and fly spawners, and keep hitting Pesce until the retreat sequence clears the fight. Prince Frog’s Gloves help if currents are overwhelming.
Is Bank of the Wild River required for the ending?
The Trident is an important mid-game route item for Steep Canyon access with the Yellow Book. The other N4 treasures support variants, overworld tools, and 100% completion rather than the five Music Box temple ending set itself.