Max wasn't originally going to be in this. But I guess he sort of fits into this and was a temporary third wheel until Brock joined in again. Maybe it just would have been to say "Ash's male friends" lol.
But anyway, I don't think these guys get as much respect as they deserve. Especially not Tracey, Max, and Dent. I recently figured out just how little notoriety they get when browsing Fanfiction.net.
They don't have a lot of stories that focuses on them. Sure they are in many, but only as a third wheel to what ever the story is about. It will usually be a story about Ash in a Shipping with one of his female friends. That's about 90% of all Pokemon fan fiction right there (exaggeration)
Ash's female friends (the second wheels) and even Ash's rivals have more stories about them than the third wheel boys do. I can understand that Tracey, Max, and Dent's lack of stories are a result of their unpopularity among fans, but Brock? Everyone loves Brock. But everyone would just rather see him as a sidekick and not a main character.
This stamp was made to support the third wheels (or fourth wheel for AG). They need more love.
Brock/Takeshi, Tracey/Kenji, Max/Masato, and Dent © Pokémon