Rust Bulbling

Rust Bulblings are a species of Grub Dog debuting in Pikmin: Other Frontier, they have dark orange hides an light gray heads with red irises. They also usually stay in small groups alongside other species of Bulbling and Dwarf Bulborbs.

As a larva they were fed a diet of metallic compounds which began to naturally form over thier bodies forming a iron shell, this makes then immune to direct physical harm via throwing Pikmin which allowed for their relatives to be killed instantly, instead they need to be swarmed in order to properly dispatch them. Otherwise Rust Bulblings are similar to their regular counterparts aside from having slightly more health than their relatives.

Olimar's Notes
"Like Lithopods, Rust Bulblings consume metallic compound from their parents at a young age. Unlike Lithopods which allows them to gain important bacterium, these Grub Dogs gain the ability to naturally creates these compounds on their hides allowing for drastically increased defensive capabilities."

Louie's Cooking Tips
"The metal on their backsides can be molded into durable pots and pans which work wonders on tenderizing the otherwise tough meat."