|Game(s)||Newer Super Mario Bros. Wii|
Newer Super Mario Bros. Wii Plus
|Previous level||(3-7) Slanty Shroomroad|
|Next level||(3-) Capshroom Airship|
Moltenwire Castle (or World 3-) is the ninth Level and Castle of Mushroom Peaks from Newer Super Mario Bros. Wii and Newer Super Mario Bros. Wii Plus. This level takes place inside a castle filled with Fire Bars, as well as being an Autoscrolling Level. Ricky Wrench is fought here for the second and final time.
- Star Coin 1: At the start of the level, this Star Coin will be in plain sight. Either perform some wall-jumps or use a Propeller Suit to reach it before it's pushed off-screen.
- Star Coin 2: It is recommended to have activated the Yellow Switch for this Star Coin. After the first two Swinging Platforms, jump to the upper level, then carefully follow it to a platform that can only be found after activating the Yellow Switch. You can also use a Propeller Suit to reach it, but watch out for the Fire Bars.
- Star Coin 3: This Star Coin will be in plain sight in between two Fire Bars. Either carefully wall jump between the blocks beside it, or use a Propeller Suit to obtain it.
|Areas||Levels||Chomproller Heights • Grimymole Mine • Butterwood Crossing • Wobbleshroom Bluffs • Burnblaze Tower • Fungi Pit • Bubble Basin • Slanty Shroomroad • Moltenwire Castle • Capshroom Airship|
|Other||Mountain Mall • Challenge House C • Mushroom Music House|
|Enemies||Enemies||Big Cheep Cheep • Big Fuzzy • Big Goomba • Bob-omb • Boomerang Bro • Bullet Bill • Chain Chomp • Cheep Cheep • Cheep Chomp • Dry Bones • Flame Chomp • Fuzzy • Goomba • Hammer Bro • Koopa Paratroopa • Koopa Troopa • Mechakoopa • Mega Cheep Cheep • Mega Monty Mole • Monty Mole • Micro-goomba • Paragoomba • Piranha Plant • Venus Fire Trap|
|Bosses||Ricky Wrench • Morton Koopa Jr.|