When Andy wants to take Buzz to Pizza Planet, he couldnt find Buzz, so instead, he took Woody. Buzz followed them to the petrol station, and dragged Woody out of the car and without noticing Woody was gone, Andy and his mum went off. When Buzz and Woody followed, they got to Pizza Planet. As this was when Buzz was an 'astro-nothing' then, he got distracted by the spaceship shaped Claw Machine, mistaking it for a real spaceship. When he climbed in, he encountered many squeeze toy aliens, which look a lot like Andy's 3 Aliens, except Andy didnt own them at that time, as it was Toy Story 1.