Applebloom: "Heeey, Spike."

Scootaloo: "Sweetie Belle tried to sabotage Rarity's work last night and she's the only pony who knows how to make things right."

Spike: "That's terrible!"

Scootaloo: "Don't worry, if we hop on the train, we'll be able to get there just in time to save Rarity's career."

Spike: "Oh, phew. Good luck!"

Apple Bloom: "Mm-hmm. But we just don't have the money for train tickets-" *winks at Scootaloo*

Scootaloo: "Oh, but doesn't Spike have some gems lying around? Enough for to pay for a two way trip for... three fillies?"

Spike: "I'm doing this for Rarity..."

*glares and gives them a handful of jewels*

*they run off happily*

Spike: "AND YOU'RE PAYING ME BACK WHEN THIS IS OVER!"

--

presumably he badgers them later about paying him back and gets Twilight over and she scolds them for taking advantage of Spike's kindness

then he attempts to bargain with Twilight for more than he originally had because Spike's a dork