Betsy Krabs

"Betsy Krabs" was not Kelsi's sidekick until the very end of East vs. West of Wipeout Canada, the mother of Eugene H. Krabs and Pearl Krabs who first appeared in Sailor Mouth from season two.

Wipeout Canada
In Wipeout Canada, Betsy Krabs was chosen by Jason Cross, a character who hates Ron Wear, was absent for three episodes of the show (along with the other characters from SpongeBob SquarePants expect for Pearl Krabs). She was absent for Chocolate Thunder, Heroes Edition and Athletes Edition. She was a mermaid in Hot Cop and the Fuzz.

Trivia

 * While Betsy sets up her special moves, you cannot see Caroline Dalpe.