I’m Luke Summerhayes, and I love Brute Bonnet.
The lore around Pokéballs has always been quite vague for a technology so fundamental to the Pokémon series. We know the design was inspired by similar technologies seen in Dragonball and Ultraman. It makes sense creatively as a way for our protagonists to have a team of dragons and beasts with them while still being able to enter buildings and ride bicycles and so on.
In-game, first we had Voltorb, which was said to be a case of possession from within the Pokéball factory. Then in the second generation, we met Kurt and were introduced to an ancient form of ball made from Apricorn. In the fourth movie, we see an old wind-up version. In the sixth generation, we visited the Pokéball factory, and in legends arceus we learn that maybe Pokémon had the ability to shrink in size even prior to the invention of Pokéballs.
Brute Bonnet is a Paradox Pokémin found in Area Zero of Pokémon Scarlet’s Paldea region. It resembles the fifth generation Grass and Poison Pokémon Amoonguss, with the addition of some overgrown foliage draping down and a pair of actual legs to walk on. Its Pokéball-esque cap is covered with small spikes.
Violet
It bears a slight resemblance to a Pokémon described in a dubious magazine as a cross between a dinosaur and a mushroom.

The Paradox Pokémon of Scarlet are supposedly from the ancient past, or at the very least some alternative timeline. In this case, it seems odd that a prehistoric monster that rubbed shoulders with dinosaurs should have camouflage like a modern Pokéball.
Scarlet
There is a theory that the developer of the modern-day Poké Ball really liked Foongus, but this has not been confirmed.

In that same game, we can read another entry.
Enigmas of Paldea, File #06
Brute Bonnet: Amoonguss Meets Dinosaur?
This bizarre creature is sad to combine traits of dinosaurs with those of the Pokemon Amoonguss. It's named after a fierce mushroom creature of matching description that appears in the renowned Scarlet Book. Brute Bonnet certainly resembles Amoonguss, through with its own unique twists: its gigantic stature and seemingly low intelligence combine to make it a savage powerful fighter.
Although Brute Bonnet hasn’t been as absolutely dominant in the competitive scene as Amoonguss, it’s switch to a dark typing and change of stat distribution does make it a more threatening attacker, compared to Amoonguss’ traditional defensive role.
The Pokéball is, intentionally, a symbol of the series. It makes sense there are a couple of mascot monsters that use the design, and I think the which came first, the chicken or the egg question at the heart of Amoonguss makes it a perfect candidate for a mysterious paradox monster.
Original music for Luke Loves Pokémon is by Jonathan Cromie. Artwork is by Katie Groves. Funding is provided by listeners at Patreon.com/PodcastioPodcastius. For just a dollar a month, supporters can listen to episodes a week early and also help cover hosting and fees, making it possible for me to keep making episodes every week.
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I love Brune Bonnet. And remember, I love you too.