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 Boy Scout uniforms.

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 (in Shelly and Donny's case, 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.