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.