I changed the location of all my bases depending on my location in the fame,it was so fun,I,with 5 years old almost destroyed my GBA when I encountered that kid who tels ehere your base is.I feeled violated.
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So,I have a Wish,I Wish that someone make a Hack that you is the rival(I'd maek one,but i don't know howand i can't see any tutorial because i'm from Brazil,so my english)