Fake Brit: Rachel is voiced by a voice actress named Teresa Pascarelli, who is not British but Italian, though her accent is very convincing. Subverted with Elizabeth's voice actress Jane Alexander. She lives and works in Italy but she is a UK native.
The Other Darrin: Some of the characters in Tentacolino have different voice actors than the previous film, which makes them sound a lot younger. The more notable examples are Smiley the dog, Top Connors and Ronnie.