Pokemon Thief Ruby & Thief Sapphire

Features

Poke Ball, Great Ball, Ultra Ball -> Thief Ball, Robber Ball, Burglar Ball
You can capture trainers' Pokemon using those balls
Stealing is not allowed in Double Battles
You cannot capture wild Pokemon
Your Pokemon do not gain experience

•                         
•                                             Download-Thief Ruby
•                                             Download-Thief Sapphire