Their television roles include serving as the host of Disney Channel's Mike's Super Short Show (2001–2007), playing Max in The Suite Life of Zack & Cody (2005–2007), voicing Isabella Garcia-Shapiro in Phineas and Ferb (2007–2015; 2025–present), and portraying Caitlyn in Camp Rock (2008) and Camp Rock 2: The Final Jam (2010).

Stoner has been a background dancer for several artists including Missy Elliott, Eminem, Kumbia Kings, Outkast, and Will Smith.

They lent their voice to the Kingdom Hearts franchise (2008–2020) and the Holly Hobbie & Friends series of animated television specials (2006–2008).

They have also appeared in several television shows aimed at the preteen audience, including The Suite Life of Zack & Cody, That's So Raven and Drake & Josh.

They provided the voice of Isabella Garcia-Shapiro and Jenny (until Season 4) in the Disney Channel animated series Phineas and Ferb from 2007 to 2015.

Their reception in Camp Rock was particularly strong, with various media outlets suggesting it was about time they played a main character role having backed up for other big names such as Will Smith and Eminem.

Stoner uploaded a video onto their official YouTube page of her final dance rehearsal which introduced other cast members.

[6][failed verification] After choreography training in Los Angeles, Stoner appeared as a backup dancer in several music videos, notably Missy Elliott's "Work It", "Gossip Folks", "I'm Really Hot", Eminem's "Just Lose It", and "No Tengo Dinero" by the Kumbia Kings.

[10] In March 2018, Stoner came out in an article on Teen Vogue, stating they were "attracted to men, women, and people who identify in other ways.

According to Stoner, they first developed anxiety at age six due to the high-stress environment of working in the entertainment industry with symptoms including heart palpitations, hair loss, and seizures.