All you have to do is probably save before you battle him or just train.

i saved RIGHT before i battled Wallace and i have been doing extensive training i still
can't!!!!!!:(

JUST CAUTH GROUDON AND WALLACE WILL BE DEAFETED

Where is Groundon

YOU ***!

Put your pokemon in the daycare and go to one of those mudslide things that you can only
climb up if you have a mach bike. I would go to the one in the desert outer rim. Now find
some way to hold down the up directional on your GBA or DS so you'll go up and down on the
mudslide thing. I don't recommend tape, maybe a heavy flashlight. Now plug in the charger
to the back of your GBA and let it sit overnight or however long you want to and let it
sit long enough and you'll have some very strong pokemon. WARNING: THE DAYCARE PEOPLE WILL
REPLACE YOUR POKEMON'S FIRST MOVE IF THEY LEARN A NEW ONE WHILE THEY'RE IN THE DAYCARE!

NUZLEAF EVOVLES WITH A LEAF STONE, OK!

I've heard about the arrow thing but i haven't tried it yet.

I already evolved my Nuzleaf into a Shiftry

I did what you said and now my Blaziken is level 68!!!

I also switched out MIGHTYENA for a Lv.57 PIKACHU

I BEAT Wallace!!!!!!!!!!!!

Walance tyep is water and ice just try to use pokemon tipe fight and grass

I already BEAT HIM!!!:)

congadulations jk im bored

Gee, I beat him when my pokemon were level 30 to 39. I had a groudon too but I never used
him.