Trying to lower the speed stat of a Pokemon in ruby?

Question

Hi!
I'm playing Pokemon Ruby...and I have this marshstomp with really bad stats.
The stats are equalled out....I want to EV train it for defense and attack.

Is there any item in the game that allows me to lower the speed stat? Like those berries they have in Pokemon Diamond?

Thanks

Answer 1

Yes. The Tomato Berry will lower Speed EVs.
The Berry Master on Route 123 gives it to you.