Plato

Plato is a stuffed pig that used to belong to the Brain that is named after Plato, the well known Greek philosopher who lived from 348 BC to 427 BC.

Appearance
Plato was first mentioned by the Brain in Desperately Seeking Stanley. He said he gave it to someone who appreciated him more, aka Mrs. Tibble.

Trivia
When Arthur was at Mrs. Tibble's house being introduced to the new and improved Stanley Plato is shown along with many other stuffed animals. He wears a red robe, and this means that the person that the Brain gave it to the Tibble's grandmother.