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Mr. Big (Japanese: ハナビシ Hanabishi) is a character of the day who appeared in Now That's Flower Power!.
Mr. Big specializes in making fireworks. He uses crushed up Berries and uses different kinds in order to make different colors. Mr. Big was a former Coordinator. He has a total of three Contest Ribbons.
After Ash had a battle with May, he approached Ash and complemented him on how his Taillow performed well with its techniques in battle. As a result, Mr. Big wanted to see Taillow in a Pokémon Contest. May corrected Mr. Big by saying that she was the one who is training for Contests. Mr. Big complemented her as well. He teaches May about Pokémon Contests and that the secret lied in Berries. He told May that mixing Berries formed Pokéblocks. Mr. Big gave her a Pokéblock Case as every Coordinator was required to have one. After the lesson, the group go to Mr. Big's Berry building where May could make her own Pokéblocks.
As they arrived in the building, they find out that Torchic just ate some freshly picked Bluk Berries. While Ash and his friends volunteered to look for some Bluk Berries, Mr. Big stayed behind. Later, after the group successfully got the Berries, they and Mr. Big went to the Carnival of Seven Nights. Mr. Big than began the carnival by signaling the beginning of the fireworks.
- His Japanese name contains ハナビ Hanabi, which means fireworks, a reference to his work.