Yes, babies. Miki was tricked by an evil boy on the first day. Shinn used a Ditto and that Ditto transformed to look like Chiki. [ Her voice just sinks more into a whine than anything else. ] Then they ran off into the tall grass and then later there were eggs!

[ Not only did Shinn's Ditto look like Miki's Chikorta, it also adopted her flirty personality. It's still up for debate as to who seduced who... ]

Miki won that duel though, so Shinn owes a good lunch.