Tonton Streaming Lloyd in Space (2001) S1E11 - Nerd from Beyond the Stars

When a new kid(who looks like a bug)comes he is very tiny and dorky yet Lloyd and the gang take him under there wing and befriend him. But the next week he went through a metamorphisis he becomes big, strong and popular and forgets about Lloyds kindness. So then the gang decides to emarass him as revenge.