the heck i o think there r only 3 badges in this game
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get the 4th gym badge and then give him a pokemon... get the 4th gym badge and then give him a pokemon...
in lavarage town
by beating the fourth gym leader
You don't need a badge to get strength but you need a badge to use strength and that badge is the rainbowbadge and that is the 4th one in celadon city.
You need the 4th badge first to use it.