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Being entranced by the type and the pokemon it provides. For grass type users, they're so in-tune with the forests, plants and agriculture. For fire type users, they enjoy the beauty and excitement of the flames. For electric type users, they love technology and electricity provides that for them. Etc. Steven loves to mine for gems, which is why he has a rock/steel team (rock for jewels and steel for pickaxe). Alder is free-spirited and loves to travel, something bugs do, which is why his ace is a bu-type.
