Chilma is the Metamoran Fusion of Chi-Chi and Bulma, and therefore considered the "wife" of Gogeta and "mother" of Gotenks. She was first formed after Bulma was brought back to life after BH's human extinction attack because of her rude personality. Goku taught both of them the poses to be ready for another arrival of BH.
In Dragon Ball GT[]
Chilma returns in DBGT as a Majin facing against Super Saiyan 4 Goku. BH stated to Goku that her power level was 250,000,000. He also gave her the ability to fly and use ki attacks including the combination of Goku's and Vegeta's moves, and calling it Galick Wave (a combination of Galick Gun and Kamehameha Wave).