Board Thread:Episode Discussion/@comment-9093757-20161011120803/@comment-9093757-20161012115603

Actually, thinking about it, maybe the only boys who have had the berries are Butters and Cartman because Butters usually needs persuading before he goes against Cartman. I think the rest of them had reasons to do it.

Heidi must have taken the berries because, as shown in Follow That Egg, she hates Eric Cartman.

Onto your last point, I don't think the boys are remorseful, they're just scared because a)They could get caught and b)They know Skankhunt42 is still out there.

I think the memberberries all are different so all make the people change in different ways, depending on their personality.