At least level 56-65.
When you've defeated Kevin (your brother) at Snowsoft Gym, go to Wally's dad's house and he should give you surf (just like in the normal Emerald game).
hes with his mom and dad i don't know what city that's all i know.. soz
1. Face the water 2. Open up the Menu 3. Select "Pokemon" 4. Select the Pokemon you taught Surf to 5. Press Surf
Eddie Haskell
The Where's Wally series of books were created by author Martin Handford in the United Kingdom. Known as Where's Waldo in North America, these books are images of crowds in various settings where the reader's goal is to spot Wally in the crowd.
After you beat the elite 4 you can battle wally at the end of victory road after you beat him exit then enter and his Pokemon will be stronger
It depends on the levels of your pokemon, and the ones Wally has. This is in Victory Road, so I assume he has level 40-50 pokemon. If yours are around this nature also, you shouldn't have a problem. But, seeing as you said Marshtomp, instead on Swampert (the final evelution), I'm worried your pokemon are much to low to even be at Victory Road. Anyway, the NPC's of pokemon are always using terrible moves etc, so it should be a breeze.
You can battle Wally a second time after defeating the Pokemon League.
Wally is in victory road at the very end his Pokemon levels between 40-45 his Pokemon are his level 45 gardevoir his level 44 altarla his level 43 delcatty and those are Pokemon I can remember so before you go in be sure a fighting type a dragon type or electric and a dark type good luck :)
Wally does not become the champion, but he is in victory road and is pretty powerful
gardevoir, altaria, delcatty, magneton, and Roselia
after each victory you get against the pkmn league
once you have helped him catch a ralts he will be at the end of victory road
Wally will occasionally be at the end of victory rode for rematch
try going back into the victory road cave where you came out at the end... walk in a little bit and you should see him standing there
Should be where you met Wally, in the gym.
wally is a Pokemon trainer who gets yours and your fathers help to catch his first pokemon,ralts.