Originally from Hoenn, at age 10 he traveled to Johto to start his journey as a trainer, all because he wanted an Cyndaquil as starter. From the beginning he showed his talent for battles, capturing and training his pokemon very well, also easily defeating the 8 Gym Leaders with his reasoning and strategy ability. During his trip he meets Killian, a charismatic boy, who started being his rival and later became a good friend.

At 14 he returned to Hoenn, this time with the purpose of accompanying and helping his little sister on her trip, along with the support of her good friend Killian. Everything was going very well, but he didn't count on Haley ending up falling in love with his friend. Something that took him by surprise, because he came to find out just when she was rejected. Nath was very upset at the way Killian had treated his sister, cutting off their friendship once and for all. For a long time he kept an eye on his sister, because she dropped into a terrible depression.

Time passed and he managed to convince Haley to travel with him to the Unova region. During the trip he learned new attacks and strategies for their team Pokémon,  defeating one or two Gym Leader, while on the other hand, his sister had regained her love for the contest and decided to travel alone and participate in the Sinnoh Contests. Nath took advantage of this opportunity to travel on his own and get to know new regions, which is why he can be seen traveling a lot today, in order to improve his Pokémon team.