Dot in Space (1994)

Dot's last romp takes her literally out of this world when she decides to rescue Whyka, the Russian space dog, who is circling the Earth, trapped in a broken-down satellite. Trading places with Buster, the space monkey, Dot boards an American rocket and is launched into orbit. She manages to save Whyka, but then crash-lands on the fantastic planet Pie-Arr-Squared, where everything is round.