The Replacements

 I remember back when I was 4/5 on MBC 3. Here's about the two siblings using a phone call a company starting with "F" to replace anything they think.

Riley Eugene Daring: "The Means Justify the Trend" (scuba), "Davey Hunkerhoff", "Ratted Out"

Tasumi: "Davey Hunkerhoff"

Abbey Wilson: "Davey Hunkerhoff"

Sierra McCool:

Jennifer and Claudia:

Other/background characters: "Davey Hunkerhoff"

"The Means Justify the Trend"

"Davey Hunkerhoff"

"Ratted Out"