Shelly and Donny

Shelly and Donny are the weapons dealers for Ammo Knights in Inkopolis in Splatoon 3: Expansion Pass.

Appearance
Shelly and Donny resemble Sheldon, but are noticeably smaller and more infantile-looking. Notably, their shells are partially translucent, and as Triops, their tails are forked. They have large, round, conjoined eyes, and wear yellow uniforms resembling those of the Boy Scouts.

Quotes
"SRL HR dept. with an org-chart update. With Sheldon working in Splatsville, his protégés, Shelly and Donny, now run Ammo Knights in Inkopolis! The little cuties really look up to Sheldon, so don't be surprised if they seem familiar. They clearly share Sheldon's love of weapons!"

- @SplatoonNA on Twitter

Trivia

 * Shelly and Donny are similar to Timmy and Tommy from the Animal Crossing series.
 * They both are duos comprising young characters of the same or similar species of an older character who fulfils a similar role.

Etymology
Shelly and Donny come from each syllable of Sheldon with the diminutive suffix -y.