Mizuho

Lola Japanese: Mizuho is a Watertype Pokmon specialist. She is the mother of Brock Forrest and eight other children. She is married to Flint. For a very short time she was the Gym Leader of the Pewter City Gym known officially as the Pewter Gym and she gave out the Boulder Badge to challengers who defeated her. Lola is married to Flint and has ten children. Flint left one day to become a professional Pokmon Trainer and never returned. Some time after that Lola herself wandered away to train Pokmon leaving Brock in charge of his many siblings. One of Lolas many hobbies is decorating. In the Chronicles episode A Family That Battles Together Stays Together Brock returned to Pewter City after traveling through Kanto Johto and the Orange Archipelago and found that Flint was shirking his Gym Leader duties. Flint explained that the Gym was ruined because Lola had returned. Lola had totally redecorated the inside and outside of the Gym planting a series of trees and bushes outside. She also filled the inside of the Gym with water and decorated it with streamers and pink hearts and stars. Flint ended up closing the Gym because he couldnt stand it anymore. Brock returned home to find his mother cheerfully redecorating the house. Lola gushed over her own work and showed off her Watertype Pokmon and said that they were much better than Rocktypes. Brock demanded to know how Flint could let this happen and Flint explained that he just couldnt say no to his wife. Lola and Flint had a rematch for the title of Gym Leader. Flint was sure he would lose due to type disadvantage but Brock pressured him into the battle anyway. Flints Pokmon almost ended up drowning in the match and had to be resuscitated. Flint was almost ready to run away again but after some flirting Lola and Flint ended up being loveydovey with each other and the two agreed to change the Gym to specialize in both Rock and Watertypes to their childrens dismay. Not ready to give up Brock decided to battle his own mother to keep the Gym the way it was and he came out victorious. Lola said she would give up trying to change the Gyms type but Flint managed to pursuade Brock to let Lola keep the decorations even though she was supposed to take them down if she lost. Brock passed on the title of Gym Leader along with most of his Pokmon to his eldest brother Forrest. Lola also made a short appearance in Grating Spaces where she went to a trip with her husband and Brocks Ludicolo leaving their children alone at home. When Brock came home and found out that the Gym was remodeled and they were leaving he became mad at both his parents. The couple and Ludicolo later came home at the end of the episode. Source: Bulbapedia