Jupiter is the second commander that the player challenges in Pokemon Diamond and Pokemon Pearl, the player will confront her in the Team Galactic Eterna Building. The player will briefly see Jupiter at Lake Acuity in the cutscene where your rival has just been defeated by her. You will fight Jupiter at Spear Pillar in a double battle with Mars. After the player defeats the main story, you will encounter her with Mars again in Stark Mountain. If the player battles her and wins, she will quit Team Galactic along with Mars.
In the anime
Skuntank are Jupiter's only known pokémon except of her Golbats. It is also her strongest pokémon.