What does Pluto look like on Samsung?

On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.

When did Samsung add Pluto?

Samsung first drew Pluto in Touchwiz 2.0, released April 26, 2013.

Samsung Electronics has shipped 26 versions of Pluto. Each is dated, so you can see when the design changed.

Samsung Experience 9.5

This is the design Samsung introduced in Experience 9.0, shipped again unchanged. It was not redrawn for this release.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does Pluto look like on Samsung?: On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.
When did Samsung add Pluto?: Samsung first drew Pluto in Touchwiz 2.0, released April 26, 2013.
How many times has Samsung redrawn Pluto?: Samsung Electronics has shipped 26 versions of Pluto. Each is dated, so you can see when the design changed.