Tiny Power and Then There Were 10 - Part 1.

Polly Kingston Pocket is a clever and curious inventor who's always looking for fun adventures. She inherits a magical locket called the Pocket Locket from her grandmother, giving her the ability to shrink to 4 inches tall. But if the locket is misused, it will stop working. Luckily, there is a special element called Pockite to recharge the locket. Before Polly turns into the new locket bearer, she found a mysterious alien watch called the Omnitrix, a powerful device that allows her to turn into ten different aliens with a simple touch - each with their own awesome power! Through crafter, very confident in herself,ringleader, instigator, charisma and great passion for her many plans, she uses the Omnitrix to stop evil, but that doesn't stop her from using it for her own personal needs.