Whatever the correct version, accompanied by Halk, a Martian scientist (once Chief Scientist of Mars), Jero, a Venusian, and a pet chameleon dog, Loopy, whose color changes according to his mood, he discovered many alien worlds (and a sub-atomic universe) in his spaceship 'The Pioneer'.
Regardless of which account is accurate, accompanied by Halk, a Martian scientist (formerly Mars' leading researcher), Jero, a Venusian, and a pet chameleon dog named Loopy, whose color changes in response to his emotions, he discovered many alien worlds (and a subatomic universe) during his space travels on the spaceship 'The Pioneer'.