The trick house is not in mauville city at all. It is located just north of slateport city.
The prize for the 2nd puzzle in the Trick House on Pokemon Emerald is a Timer Ball. To access the 2nd puzzle of the Trick House you need the Dynamo Badge from Wattson in Mauville City.
get a harbor mail from the trick house then trade it in to the girl in the house right next to the mart in mauville city
The 4th Badge is in Mauville City. But let me tell you getting it is very tricky. And you might wanna find a fire Pokemon.
Do you know where the trick house is? No? Go south of mauville city until you find a house with a sign next to it saying the trick house go in and find the trick master he will then put you through a test you must find a scroll then reach the end and talk to the master finish all his tests and he will let you choose blue or red tent.
in a house in mauville city
Go under the bridge where you bike then pass through the grass.
Return to an Route that has trainers that have Pokemon near or are level 25 here are some examples: East and West of Mauville city or the Trick House.
In Mauville City, in the house to the right of the Poke' Mart.
Cutters house mauville city
in mauville city on the right of the poke mart1. Go to Mauville city.2. Walk into the house right to the poke mart across the road.3. Talk to the man in the house.
The last house in mauville city to the right
go to mauville city and go to the biggest house