Wha-!? What is THIS, cool!

To make it easy to understand for you, it's an evolution.

For "Information Have-not"

Mikan

Stop that. It's embarrassing.

So Kiso and Shigure can become Butterfree, right! Moreover, like THIS-

What a beauty.

What a cutey.

...About that, though.

Even Yuudachi-

Can become a Butterfree too, you know.

...Oh~ Sure, but-