In the games
Barry is the player's best friend and rival. He is known to be very impatient, and he always in a rush, and occasionally bumps into the player when they meet. He always chooses the starter with the type advantage on the player's.
In the anime
Barry appears as the rival of Ash. He admires Paul, another rival of Ash from Sinnoh. It is also known that despite being from Twinleaf Town, he does not remember Dawn, unlike his game counterpart who is the best friend of Dawn when she is selected by the player.
In the manga
Barry's counterpart is Pearl, who serves as one of the two deuteragonists in the Diamond and Pearl' arc, the other one being Diamond (Lucas's counterpart), while Platinum (Dawn's counterpart) serves as the main protagonist. He lives in Twinleaf Town, and when Diamond and he met Platinum, she mistook them for her bodyguards, as the matched the description of one of them having a red scarf and the other one having a green scarf.
- Barry possesses the highest-level Pokémon amongst all the rival characters, with his starter being able to grow up to level 85 in Pokémon Platinum. The only NPC-owned Pokémon outside of a battle facility that outlevels Barry's starter at its strongest is Red's level 88 Pikachu in Pokémon HeartGold and SoulSilver.
- In the English dub of the anime, Barry's name rhymes with "Gary", another rival of Ash who is the grandson of Professor Oak.