On the TV series
Sonic X (2003), 4Kids decided to cast Amy Palant as Tails instead of
William Corkery. After that, Sega of America decided that they should keep all Sonic media the same, so after
Sonic Advance 3 (2004), Palant replaced William Corkery. She kept voicing Tails until 2010, when she herself was replaced with
Kate Higgins, starting with
Sonic Colors (2010).