Editing Treacherous Halls

{{level infobox

|title=Treacherous Halls

'''Treacherous Halls''' is a promotional [[e-Reader]] level for ''[[Super Mario Advance 4: Super Mario Bros. 3]]''. Its official difficulty rating is ★★★★★, making it one of the more difficult e-Reader levels. Much of the level consists of [[stomp]]ing enemies over [[spike Trap|spikes]] to cross them. Many [[Piranha Plant]]s also appear, as well as two [[Flurry|Flurries]], one of which has to be ridden to collect an [[Advance Coin]] and also a [[1-Up Mushroom]]. [[Boom Boom]] is fought at the end of the level. It was initially released only in Japan, but it eventually became available internationally when the game was brought to the [[Wii U]] [[Virtual Console]] in 2016. The key art for the card featured Boom Boom.

|[[File:Grand Goomba SMAS SMB3.png]]<br>[[Big Goomba|Grand Goomba]]

|[[File:Big Koopa Troopa.png]]<br>[[Giant Koopa|Green Giant Koopa]]

|[[File:GiantParakoopas SMB3.png]]<br>[[Big Koopa Paratroopa|Colossal Koopa Paratroopa]]

|[[File:SMA4 Goomba Sprite.png]]<br>[[Goomba]]

|[[File:SMA4 Koopa Troopa Green.png]]<br>[[Koopa Troopa|Green Koopa Troopa]]

|[[File:SMA4 Buzzy Beetle Sprite.gif]]<br>[[Buzzy Beetle]]

|[[File:Red Paragoomba SMB3 All-Stars.png]]<br>[[Paragoomba|Red Para-Goomba]]

|[[Piranha Plant]]

|[[Fire Piranha Plant|Venus Fire Trap]]

|[[File:SMA4 Flurry sprite.png]]<br>[[Flurry]]

|[[File:SMA4 Dry Bones.png]]<br>[[Dry Bones]]

|[[File:SMA4 Koopa Paratroopa Green.png]]<br>[[Koopa Paratroopa|Green Koopa Paratroopa]]

|[[File:SMA4 SMB3 Spiny.png]]<br>[[Spiny]]

|[[File:SMAS SMB3 Boom Boom attack.gif]]<br>[[Boom Boom]]

[[File:Treacherous Halls map.png|thumb|Map of the level.]]

{{SMB3 levels}}

[[Category:Volcanic areas]]